A person does a cartwheel in Oxford Circus during rush hour as the spread of the coronavirus disease (COVID-19) continues, London, Britain, March 23, 2020. REUTERS/Dylan Martinez

Cricket - ICC Cricket World Cup - England v New Zealand - Emirates Riverside, Chester-Le-Street, Britain - July 3, 2019 A pitch invader performs a cartwheel during the match Action Images via Reuters/Lee Smith

During initial tests of their 8.1-metre tall reusable rocket, Chinese engineers from LinkSpace, a start-up led by China's youngest space entrepreneur, used a Kevlar tether to ensure its safe return. Just in case. But when the Beijing-based company's prototype, called NewLine Baby, successfully took off and landed last week for the second time in two months, no tether was needed. The 1.5-tonne rocket hovered 40 metres above the ground before descending back to its concrete launch pad after 30 seconds, to the relief of 26-year-old chief executive Hu Zhenyu and his engineers - one of whom cartwheeled his way to the launch pad in delight. LinkSpace, one of China's 15-plus private rocket manufacturers, sees these short hops as the first steps towards a new business model: sending tiny, inexpensive satellites into orbit at affordable prices. Demand for these so-called nanosatellites - which weigh less than 10 kilogrammes and are in some cases as small as a shoebox - is expected to explode in the next few years. And China's rocket entrepreneurs reckon there is no better place to develop inexpensive launch vehicles than their home country. REUTERS/ SEARCH "SHOEBOX CHINA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: SPACE-EXPLORATION/CHINA-STARTUPS

An attendee does a cartwheel while rollerskating at the South by Southwest (SXSW) conference and festivals in Austin, Texas, U.S., March 11, 2019. REUTERS/Sergio Flores

An attendee does a cartwheel while rollerskating at the South by Southwest (SXSW) conference and festivals in Austin, Texas, U.S., March 11, 2019. REUTERS/Sergio Flores

Autumn Bravo-Robertson, 7, of Paradise, does a cartwheel near her father, Mike, while staying at a makeshift evacuation center for people displaced by the Camp Fire in Chico, California, U.S., November 15, 2018. REUTERS/Terray Sylvester

Elizabeth Galindo, 8, does cartwheels on the beach in front of Boardwalk Hall, the venue of the 97th Miss America Competition in Atlantic City, New Jersey U.S. September 10, 2017. REUTERS/Mark Makela

Soccer Football - Japan v Australia - Tournament of Nations Soccer 2017 - Qualcomm Stadium, San Diego, California - July 30, 2017. Australia's Sam Kerr does a cartwheel after scoring her third goalagainst Japan. REUTERS/Mike Blake

Britain Football Soccer - Arsenal v Everton - Premier League - Emirates Stadium - 21/5/17 Daughter of Arsenal's David Ospina performs a cartwheel on the pitch after the match Reuters / Dylan Martinez Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Rylee Jacobs, 10, does cartwheels in front of the plane of U.S. Republican presidential candidate Donald Trump after Trump spoke at a campaign rally in Sacramento, California, U.S. June 1, 2016. REUTERS/Lucy Nicholson

Syrian refugees receive aid packages at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, January 20, 2016. REUTERS/ Muhammad Hamed

Designer Betsey Johnson does a cartwheel at the end of her Spring/Summer 2016 collection presentation during New York Fashion Week in New York, September 11, 2015. REUTERS/Andrew Kelly

A beachgoer does a cartwheel as Israeli Erez Cohen stand up paddles (back) in the Mediterranean Sea in the coastal city of Ashkelon April 20, 2015. REUTERS/Amir Cohen

A woman cartwheels through the Coachella Valley Music and Arts Festival in Indio, California April 10, 2015. REUTERS/Lucy Nicholson

Designer Betsey Johnson (L) does a cartwheel split with her granddaughter during the Spring/Summer 2015 Betsey Johnson collection during New York Fashion Week September 10, 2014. REUTERS/Brendan McDermid (UNITED STATES - Tags: FASHION TPX IMAGES OF THE DAY)

A youth does a cartwheel on Boa Viagem beach in Recife June 30, 2014. In a project called "On the Sidelines" Reuters photographers share pictures showing their own quirky and creative view of the 2014 World Cup in Brazil. REUTERS/Brian Snyder (BRAZIL - Tags: SPORT SOCCER WORLD CUP SOCIETY TRAVEL)

Caroline Shumway of New York does a cartwheel during the first day of the New Orleans Jazz and Heritage Festival in New Orleans, Louisiana April 25, 2014. REUTERS/Jonathan Bachman (UNITED STATES - Tags: ENTERTAINMENT SOCIETY)

Germany's Anna Woerner is carried off course by medical staff following a fall during the women's freestyle skiing skicross quarter-finals at the 2014 Sochi Winter Olympic Games in Rosa Khutor, February 21, 2014. The 24-year-old's left leg appeared to give way on impact as she hit the icy landing slope after losing control over a big jump. She turned cartwheels before coming to rest and received lengthy medical attention on the course. REUTERS/Dylan Martinez (RUSSIA - Tags: SPORT SKIING OLYMPICS)

Germany's Anna Woerner is carried off course by medical staff following a fall during the women's freestyle skiing skicross quarter-finals at the 2014 Sochi Winter Olympic Games in Rosa Khutor, February 21, 2014. The 24-year-old's left leg appeared to give way on impact as she hit the icy landing slope after losing control over a big jump. She turned cartwheels before coming to rest and received lengthy medical attention on the course. REUTERS/Dylan Martinez (RUSSIA - Tags: SPORT SKIING OLYMPICS TPX IMAGES OF THE DAY)

Designer Betsey Johnson does a cartwheel following her show during New York Fashion Week in New York February 12, 2014. REUTERS/Carlo Allegri (UNITED STATES - Tags: FASHION)

Designer Betsey Johnson does a cart wheel following her show during New York Fashion Week February 12, 2014. REUTERS/Carlo Allegri (UNITED STATES - Tags: FASHION)

People enjoy themselves in the sea as Typhoon Soulik approaches the northeastern harbour of Wushih in Ilan county July 11, 2013. REUTERS/Pichi Chuang (TAIWAN - Tags: ENVIRONMENT SOCIETY)

Ellie Mowry-Silverman, 6, does a cartwheel outside Sausalito Presbyterian Church while her dad Rev. Paul Mowry greets parishioners after Sunday service in Sausalito, California June 23, 2013. Mowry plans to wed Joe Silverman, his same-sex partner of 27 years, if the U.S. Supreme Court declares California’s Proposition 8 ban on same-sex marriage unconstitutional. REUTERS/Noah Berger (UNITED STATES - Tags: POLITICS SOCIETY RELIGION)

A man inspects wooden cartwheel during an annual Traditional Applied Arts Fair in the Ethnographic Open-air Museum of Latvia in Riga, June 1, 2013. According to the organisers, the fair has more than 500 tailors, leather craftsmen, wood carvers, jewellery designers, blacksmiths, basket-makers, weavers, potters, as well as knitters from all over Latvia who will be selling their crafts from June 1 to 2. REUTERS/Ints Kalnins (LATVIA - Tags: SOCIETY TRAVEL)

A child does a cartwheel in Gatumba, outside Bujumbura, as clouds shroud the mountains of eastern Democratic Republic of Congo April 19, 2013. Picture taken April 19, 2013.
REUTERS/Darrin Zammit Lupi (BURUNDI - Tags: SOCIETY TPX IMAGES OF THE DAY)

Tina Maze of Slovenia celebrates as she performs her trademark cartwheel after winning the season's last women's Giant Slalom race at the Alpine Skiing World Cup finals in Lenzerheide March 17, 2013. REUTERS/Pascal Lauener (SWITZERLAND - Tags: SPORT SKIING)

Superintendent of House Office Buildings William Weidemeyer (R) watches a cartwheel performed by an unidentified staffer from House of Representatives elect Cheri Bustos during the lottery drawing for offices on Capitol Hill in Washington November 30, 2012.
REUTERS/Gary Cameron (UNITED STATES - Tags: POLITICS)

Tina Maze of Slovenia celebrates winning the ladies World Cup giant slalom ski race by doing a cartwheel in the finish area in Aspen, Colorado November 24, 2012. REUTERS/Rick Wilking (UNITED STATES - Tags: SPORT SKIING)

A visitor in a bathrobe does a cartwheel in the rain while visiting Times Square in New York October 29, 2012. As Hurricane Sandy aimed straight for them, promising to hammer the place they live with lashing winds and extensive flooding, New Yorkers seemed to be all about nonchalance on Monday morning - an attitude that didn't last into the afternoon. REUTERS/Adrees Latif (UNITES STATES - Tags: ENVIRONMENT DISASTER SOCIETY TPX IMAGES OF THE DAY)

Fashion designer Betsey Johnson smiles after performing a cartwheel at the end of her retrospective fashion show and 70th birthday party during New York Fashion Week September 11, 2012. REUTERS/Keith Bedford (UNITED STATES - Tags: FASHION)

Koval Abdulraheem of Iraq performs a cartwheel in celebration after a throw in the Men's F40 classification Javelin final at the Olympic Stadium in Olympic Park at the London 2012 Paralympic Games September 7, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT OLYMPICS ATHLETICS)

Ahmed Naas of Iraq performs a cartwheel in celebration as he throws in the Men's F40 classification Javelin final at the Olympic Stadium in Olympic Park at the London 2012 Paralympic Games September 7, 2012. He won silver. REUTERS/Toby Melville (BRITAIN - Tags: SPORT OLYMPICS ATHLETICS)

Ahmed Naas of Iraq performs a cartwheel in celebration as he throws in the Men's F40 classification Javelin final at the Olympic Stadium in Olympic Park at the London 2012 Paralympic Games September 7, 2012. He won silver. REUTERS/Toby Melville (BRITAIN - Tags: SPORT OLYMPICS ATHLETICS)

Montenegro's Majda Mehmedovic does a cartwheel to celebrate after beating Spain in their women's semi-final match at the Basketball Arena during the London 2012 Olympic Games August 9, 2012. REUTERS/Marko Djurica (BRITAIN - Tags: SPORT HANDBALL OLYMPICS)

USA's Megan Rapinoe (R) and Abby Wambach (14) do their trademark cartwheels after Wamback scored on New Zealand during their women's quarter final soccer match at the London 2012 Olympic Games at St James' Park in Newcastle, northern England August 3, 2012. REUTERS/Nigel Roddis (BRITAIN - Tags: SPORT OLYMPICS SPORT SOCCER)

USA's Megan Rapinoe (R) and Abby Wambach (14) do their trademark cartwheels after Wamback scored on New Zealand during their women's quarter final soccer match at the London 2012 Olympic Games at St James' Park in Newcastle, northern England August 3, 2012. REUTERS/Nigel Roddis (BRITAIN - Tags: SPORT OLYMPICS SPORT SOCCER)

Activist Austin Guest does cartwheels after he and other protesters were able to gain access into the Winter Garden Atrium located inside the World Financial Center in New York December 12, 2011. Guest, a 31-year-old Harvard graduate, has been involved with Occupy Wall Street since the early days of the movement's encampment at Manhattan's Zuccotti Park. An online community organizer and an actor, Guest describes the movement against economic inequality as the best thing that has ever happened in his life. He has since quit his day job and moved out of his apartment to commit himself fully to Occupy. Picture taken December 12, 2011. REUTERS/Andrew Burton (UNITED STATES - Tags: CIVIL UNREST BUSINESS SOCIETY)

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Argentina's Yuri Maier does a cartwheel after winning his 96kg bronze medal wrestling match against Honduras' Randy Lambert at the Pan American Games in Guadalajara October 21, 2011. The games run through October 30. REUTERS/Andy Clark (MEXICO - Tags: SPORT WRESTLING)

Designer Betsey Johnson does a cartwheel on the runway during the Betsey Johnson Spring/Summer 2012 show during New York Fashion Week September 12, 2011. REUTERS/Allison Joyce (UNITED STATES - Tags: FASHION)

Boys attempt cartwheels on the beach in Santa Monica, California August 24, 2011. A heat wave is hitting Southern California with parts of Los Angeles likely to reach 105 degrees Fahrenheit (40.6 degrees Celsius) Thursday through Saturday. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT)

Los Angeles Galaxy's Robbie Keane of Ireland cartwheels after scoring against the San Jose Earthquakes during their MLS soccer match in Carson, California August 20, 2011. REUTERS/Lucy Nicholson (UNITED STATES - Tags: SPORT SOCCER)

Los Angeles Galaxy's Robbie Keane of Ireland cartwheels after scoring against the San Jose Earthquakes during their MLS soccer match in Carson, California August 20, 2011. REUTERS/Lucy Nicholson (UNITED STATES - Tags: SPORT SOCCER IMAGES OF THE DAY)

Seven year-old Anya Nicoll (L) does a cartwheel next to her five year-old sister Tava after a swim in Loon Lake in Freedom, New Hampshire July 2, 2011. Anya and Tava's parents started the plastics design and production company Ambix in 2005 despite the economic downturn, and it has proven so successful that they moved it to nearby Conway and are now hiring. Voters in the Iowa caucus and the New Hampshire primary will be the first to cast ballots in the upcoming U.S. Presidential race. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY POLITICS)

Jamaica's Omar Daley does a cartwheel as he celebrates scoring a goal against Grenada during the second half of their CONCACAF Gold Cup soccer match in Carson, California June 6, 2011. REUTERS/Danny Moloshok (UNITED STATES - Tags: SPORT SOCCER)

Twelve-year-old Hamza collects wood for fuel from a dumping ground during the early morning in a Karachi slum February 20, 2011. REUTERS/Akhtar Soomro (PAKISTAN - Tags: SOCIETY ENVIRONMENT)

Designer Betsey Johnson does a cartwheel on the runway after her Fall/Winter 2011 collection show during New York Fashion Week February 14, 2011. REUTERS/Eric Thayer (UNITED STATES - Tags: FASHION IMAGES OF THE DAY)

Designer Betsey Johnson does a cartwheel on the runway at her Spring 2011 collection during New York Fashion Week September 13, 2010. REUTERS/Eric Thayer (UNITED STATES - Tags: FASHION)

Winnipeg Blue Bombers Jovon Johnson (2) cartwheels into the endzone as he scores a touchdown against the Edmonton Eskimos during the second half of Canadian Football League action in Winnipeg, July 24, 2010. REUTERS/Fred Greenslade (CANADA - Tags: SPORT FOOTBALL)

Janica Kostelic, sister of Croatia's silver medalist Ivica, does a cartwheel in front of the podium after the victory ceremony for the men's Alpine Skiing Slalom event at the Vancouver 2010 Winter Olympics in Whistler, British Columbia, February 27, 2010. REUTERS/Wolfgang Rattay (CANADA)

A competitor does a cartwheel in front of judges at a casting call for the second season of the reality television programme "Dance Your Ass Off", in which overweight or obese contestants hope to lose weight by dancing, in New York, December 18, 2009. REUTERS/Finbarr O'Reilly (UNITED STATES - Tags: ENTERTAINMENT SOCIETY)

China's Linlin Deng competes on the beam during the qualification competition at the World cup in Artistic Gymnastics in Moscow May 29, 2008. REUTERS/Grigory Dukor (RUSSIA)

Espanyol's Luis Garcia celebrates a goal against Valencia during their Spanish First Division Soccer League match at Lluis Companys stadium in Barcelona, March 1, 2008. REUTERS/Albert Gea (SPAIN)

Bosnian Serb policemen attempt to arrest a protester during a protest against Kosovo's declaration of independence, at the main square in Bosnian Serb capital Banja Luka February 21, 2008. REUTERS/ Ranko Cukovic (BOSNIA AND HERZEGOVINA)

An Ultra-Orthodox Jew plays in the snow near Nebi Samuel on the outskirts of Jerusalem February 19, 2008. REUTERS/Gil Cohen Magen (WEST BANK)

Sweden's national soccer player Daniel Andersson Lars stretches during a practice session in Santa Ana, January 10, 2008. Sweden's national soccer team will play a friendly match against Costa Rica on January 13. REUTERS/Juan Carlos Ulate (COSTA RICA)

Paula Creamer from the U.S. performs a cartwheel on the 18th hole fairway during the pro-am golf competition of the Ricoh Women's British Open at the Old Course in St. Andrews, Scotland August 1, 2007. REUTERS/David Moir (BRITAIN)

Paula Creamer from the U.S. performs a cartwheel for a photographer next to the Swilken Bridge on the 18th hole during the pro-am golf competition of the Ricoh Women's British Open at the Old Course in St. Andrews, Scotland August 1, 2007. REUTERS/David Moir(BRITAIN)

A child plays in front of the Church of Nossa Senhora da Luz near the Portuguese beach resort of Lagos, southern Portugal, June 3, 2007. REUTERS/Nacho Doce (PORTUGAL)

A national gymnast practises during a training session for the 2008 Beijing Olympics at China's General Administration of Sport in Beijing May 15, 2007. REUTERS/Alfred Cheng Jin (CHINA)

Children play on the beach in Fort Myers, Florida February 19, 2007. REUTERS/Brian Snyder (UNITED STATES)