The Grossmuenster church is seen as the Fire of Hope (Hoffnungsfeuer) burns on a boat on the Limmat River as an Advent light of the churches in Zurich, Switzerland November 29, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

The Fire of Hope (Hoffnungsfeuer) burns on a boat on the Limmat River as an Advent light of the churches in Zurich, Switzerland November 29, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

The Fire of Hope (Hoffnungsfeuer) burns on a boat on the Limmat River as an Advent light of the churches in Zurich, Switzerland November 29, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

The Grossmuenster church is seen as the Fire of Hope (Hoffnungsfeuer) burns on a boat on the Limmat River as an Advent light of the churches in Zurich, Switzerland November 29, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

The Fire of Hope (Hoffnungsfeuer) burns on a boat on the Limmat River as an Advent light of the churches in Zurich, Switzerland November 29, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

People walk past the installation by Chinese artist Ai Weiwei 'Law of the Journey (Prototype B)', a 16.4-meter long inflatable boat crowded with anonymous refugee figures, displayed at the Bangkok Art and Culture Centre BACC as part of Bangkok art Biennale in Bangkok, Thailand November 29, 2020. REUTERS/Jorge Silva

People look at a wallpaper, part of the installation by Chinese artist Ai Weiwei 'Law of the Journey (Prototype B)', a 16.4-meter long inflatable boat crowded with anonymous refugee figures, displayed at the Bangkok Art and Culture Centre BACC as part of Bangkok art Biennale in Bangkok, Thailand November 29, 2020. REUTERS/Jorge Silva

People walk past the installation by Chinese artist Ai Weiwei 'Law of the Journey (Prototype B)', a 16.4-meter long inflatable boat crowded with anonymous refugee figures, displayed at the Bangkok Art and Culture Centre BACC as part of Bangkok art Biennale in Bangkok, Thailand November 29, 2020. REUTERS/Jorge Silva

Installation by Chinese artist Ai Weiwei 'Law of the Journey (Prototype B)', a 16.4-meter long inflatable boat crowded with anonymous refugee figures, is pictured at the Bangkok Art and Culture Centre BACC as part of Bangkok art Biennale in Bangkok, Thailand November 29, 2020. REUTERS/Jorge Silva

Installation by Chinese artist Ai Weiwei 'Law of the Journey (Prototype B)', a 16.4-meter long inflatable boat crowded with anonymous refugee figures, is pictured at the Bangkok Art and Culture Centre BACC as part of Bangkok art Biennale in Bangkok, Thailand November 29, 2020. REUTERS/Jorge Silva

The installation by Chinese artist Ai Weiwei 'Law of the Journey (Prototype B)', a 16.4-meter long inflatable boat crowded with anonymous refugee figures, is pictured at the Bangkok Art and Culture Centre BACC as part of Bangkok art Biennale in Bangkok, Thailand November 29, 2020. REUTERS/Jorge Silva

People queue in front of a store of the Louis Vuitton, as the spread of the coronavirus disease (COVID-19) continues, at the Bahnhofstrasse shopping street in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

People queue in front of a store of jeweller Cartier, as the spread of the coronavirus disease (COVID-19) continues, at the Bahnhofstrasse shopping street in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

People queue in front of a store of the French luxury fashion brand Louis Vuitton, as the spread of the coronavirus disease (COVID-19) continues, at the Bahnhofstrasse shopping street in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

People queue in front of a store of Tiffany & Co., as the spread of the coronavirus disease (COVID-19) continues, at the Bahnhofstrasse shopping street in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

People queue in front of a store of Dior, as the spread of the coronavirus disease (COVID-19) continues, at the Bahnhofstrasse shopping street in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

Christmas illuminations are seen at a Harry Winston jewelry store and a Blancpain watch store, as the spread of the coronavirus disease (COVID-19) continues, at the Paradeplatz square in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

Christmas illuminations are seen on a Breitling watch store in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

Christmas illuminations are seen on the Confiserie Spruengli at the Paradeplatz square in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

People walk under Christmas illuminations, as the spread of the coronavirus disease (COVID-19) continues, on Bahnhofstrasse shopping street in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

Christmas illuminations are seen on the Savoy Hotel Baur En Ville at the Paradeplatz square in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

Christmas illuminations are seen on the buildings of Swiss banks UBS and Credit Suisse at the Paradeplatz square in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

Christmas illuminations are seen on the headquarters of Swiss bank Credit Suisse at the Paradeplatz square in Zurich, Switzerland November 28, 2020. Picture taken with long exposure. REUTERS/Arnd Wiegmann

A woman stands beside a part of one kilometre-long Christmas illuminations with the colours of the Spanish flag, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, November 26, 2020. REUTERS/Sergio Perez

People stand beside a part of one kilometre-long Christmas illuminations with the colours of the Spanish flag, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, November 26, 2020. REUTERS/Sergio Perez

A woman stands near a part of one kilometre-long Christmas illuminations with the colours of the Spanish flag, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, November 26, 2020. REUTERS/Sergio Perez

People stand next to a part of one kilometre-long Christmas illuminations with the colours of the Spanish flag, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, November 26, 2020. REUTERS/Sergio Perez

Cars are seen under a part of a one kilometre-long Christmas illuminations with the colours of the Spanish flag, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, November 26, 2020. REUTERS/Sergio Perez

A man walks past a part of one kilometre-long Christmas illuminations with the colours of the Spanish flag, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, November 26, 2020. REUTERS/Sergio Perez

A woman stands under a part of one kilometre-long Christmas illuminations with the colours of the Spanish flag, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, November 26, 2020. REUTERS/Sergio Perez

Trialist Pavel Prikhodko pulls an off-road vehicle using his teeth during a 1,200-metre-long challenge in the settlement of Verkhnerusskoye in Stavropol Region, Russia November 25, 2020. Prikhodko successfully fulfilled the task. REUTERS/Eduard Korniyenko

Trialist Pavel Prikhodko pulls an off-road vehicle using his teeth during a 1,200-metre-long challenge in the settlement of Verkhnerusskoye in Stavropol Region, Russia November 25, 2020. Prikhodko successfully fulfilled the task. REUTERS/Eduard Korniyenko

Trialist Pavel Prikhodko pulls an off-road vehicle using his teeth during a 1,200-metre-long challenge in the settlement of Verkhnerusskoye in Stavropol Region, Russia November 25, 2020. Prikhodko successfully fulfilled the task. REUTERS/Eduard Korniyenko

Trialist Pavel Prikhodko pulls an off-road vehicle using his teeth during a 1,200-metre-long challenge in the settlement of Verkhnerusskoye in Stavropol Region, Russia November 25, 2020. Prikhodko successfully fulfilled the task. REUTERS/Eduard Korniyenko

Activist "Long Hair" Leung Kwok-hung holds a protest sign ahead of Hong Kong Chief Executive Carrie Lam's annual policy address at the Legislative Council in Hong Kong, China November 25, 2020. REUTERS/Lam Yik

Customer carries fresh turkeys while others wait in an hours-long line to pick up them up, ahead of the Thanksgiving holiday in the U.S., at Raymond’s Turkey Farm in Metheun, Massachusetts, U.S., November 24, 2020. REUTERS/Brian Snyder

Customers carry fresh turkeys to their cars while others wait in an hours-long line to pick up them up, ahead of the Thanksgiving holiday in the U.S., at Raymond’s Turkey Farm in Metheun, Massachusetts, U.S., November 24, 2020. REUTERS/Brian Snyder

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang TPX IMAGES OF THE DAY

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, takes off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

Employees and engineers of China's space missions are seen before the launch by the Long March-5 Y5 rocket, at the Wenchang Space Launch Center in Hainan Province, China November 23, 2020. Picture taken November 23, 2020. REUTERS/Tingshu Wang

Pei Zhaoyu, spokesperson for Chang'e-5 Mission, attends a meeting with media before the launch by the Long March-5 Y5 rocket, at Wenchang Space Launch Center in Hainan Province, China November 23, 2020. Picture taken November 23, 2020. REUTERS/Tingshu Wang

A badge of China Lunar Exploration Program is seen on an employee's uniform, before the launch by the Long March-5 Y5 rocket at Wenchang Space Launch Center in Hainan Province, China November 23, 2020. Picture taken November 23, 2020. REUTERS/Tingshu Wang

Qu Yiguang, Deputy Commander of the Long March-5 carrier rocket, speaks to the media before the launch by the Long March-5 Y5 rocket, at Wenchang Space Launch Center in Hainan Province, China November 23, 2020. Picture taken November 23, 2020. REUTERS/Tingshu Wang

Pei Zhaoyu, spokesperson for Chang'e-5 Mission, attends a meeting with media before the launch by the Long March-5 Y5 rocket, at Wenchang Space Launch Center in Hainan Province, China November 23, 2020. Picture taken November 23, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, is seen before taking off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The Long March-5 Y5 rocket, carrying the Chang'e-5 lunar probe, is seen before taking off from Wenchang Space Launch Center, in Wenchang, Hainan province, China November 24, 2020. REUTERS/Tingshu Wang

The launch tower with the Long March-5 Y5 rocket inside, is seen before the launch at Wenchang Space Launch Center in Hainan province, China November 23, 2020. REUTERS/Tingshu Wang

Men in China Space uniforms are seen before the launch of the Long March-5 Y5 rocket which will carry an unmanned lunar probe of the Chang'e-5 probe mission, at the Wenchang Space Launch Center in Hainan province, China November 23, 2020. REUTERS/Tingshu Wang

An image of Chinese President Xi Jinping is seen inside a building at the Wenchang Space Launch Center before the launch by the Long March-5 Y5 rocket, in Hainan Province, China November 23, 2020. REUTERS/Tingshu Wang

An image of Chinese President Xi Jinping is seen inside a building at the Wenchang Space Launch Center before the launch by the Long March-5 Y5 rocket, in Hainan Province, China November 23, 2020. REUTERS/Tingshu Wang

Flags with Chinese Communist Party's emblem flutter along a road leading to a launch tower with the Long March-5 Y5 rocket inside before its launch, at Wenchang Space Launch Center in Hainan Province, China November 23, 2020. REUTERS/Tingshu Wang

A man rides a bicycle past a rocket launch tower before the launch by the Long March-5 Y5 rocket, at Wenchang Space Launch Center in Hainan Province, China November 23, 2020. REUTERS/Tingshu Wang