Children's books are pictured during a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

Children's books are pictured during a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

Children's books are pictured during a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

Children's books are pictured during a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

A police officer stands in front of a screen during a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

Senior Superintendent Steve Li Kwai-wah, of the police’s National Security Department, attends a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

Senior Superintendent Steve Li Kwai-wah, of the police’s National Security Department, poses during a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

Senior Superintendent Steve Li Kwai-wah, of the police’s National Security Department, speaks during a news conference after five people were arrested on suspicion of conspiring to publish "seditious material" with the intent of inciting public hatred towards the government among children, in Hong Kong, China, July 22, 2021. REUTERS/Tyrone Siu

A police officer carries boxes of evidence after five people were arrested on suspicion of publishing and distributing seditious material, in Hong Kong, China July 22, 2021. REUTERS/Tyrone Siu

A police officer escorts one of five suspects, detained on suspicion of publishing and distributing seditious material, in Hong Kong, China July 22, 2021. REUTERS/Tyrone Siu

A police officer escorts one of five suspects, detained on suspicion of publishing and distributing seditious material, in Hong Kong, China July 22, 2021. REUTERS/Tyrone Siu

Police officers escort one of five suspects, detained on suspicion of publishing and distributing seditious material, in Hong Kong, China July 22, 2021. REUTERS/Tyrone Siu

Publisher Jimmy Pang poses at the Hong Kong Book Fair, in Hong Kong, China, July 14, 2021. REUTERS/Tyrone Siu

Publisher Jimmy Pang and political commentator Johnny Lau Yui-siu speak at the Hong Kong Book Fair, in Hong Kong, China, July 14, 2021. REUTERS/Tyrone Siu

Publisher Jimmy Pang poses at the Hong Kong Book Fair, in Hong Kong, China, July 14, 2021. REUTERS/Tyrone Siu

Publisher Raymond Yeung poses with his book at the Hong Kong Book Fair, in Hong Kong, China, July 14, 2021. REUTERS/Tyrone Siu

A look at the frequency of winning spelling bee words among the body of Google Books texts published between 1800 and 2019.

The logo of Swiss publishing group Ringier is seen in Zurich, Switzerland July 8, 2021. REUTERS/Arnd Wiegmann

Daisy Hand, 38, does a nightly patrol around the Tenacious Unicorn Ranch in Westcliffe, Colorado, U.S., June 25, 2021. The ranchers recently restarted nightly patrols after they say they saw an uptick in threats of physical violence after a news media article about them was published. REUTERS/Leah Millis SEARCH "UNICORNS MILLIS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A man buys a copy of the final edition of Apple Daily, published by Next Digital, from a newsstand in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

Copies of the final edition of Apple Daily, published by Next Digital, are seen at a newsstand in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

Copies of the final edition of Apple Daily, published by Next Digital, are seen at a newsstand in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

A woman holding a copy of the final edition of Apple Daily, published by Next Digital, takes pictures of the newspaper front page in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

People buy copies of the final edition of Apple Daily, published by Next Digital, from a newsstand in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

People queue to buy copies of the final edition of Apple Daily, published by Next Digital, in the Central financial district, in Hong Kong, China June 24, 2021. REUTERS/Tyrone Siu

The logo of Apple Daily newspaper is seen at the headquarters of its publisher Next Digital after the announcement that the newspaper is folding its operations earlier, in Hong Kong, China June 23, 2021. Picture taken June 23, 2021. REUTERS/Tyrone Siu

People queue to buy copies of the final edition of Apple Daily, published by Next Digital, in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

People queue to buy copies of the final edition of Apple Daily, published by Next Digital, in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

People queue to buy copies of the final edition of Apple Daily, published by Next Digital, in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

Staff light their phone flashlights and wave to supporters at the headquarters of the Apple Daily newspaper, and its publisher Next Digital, after the announcement that it will print its last edition, in Hong Kong, China June 23, 2021. Picture taken June 23, 2021. REUTERS/Lam Yik

Staff light their phone flashlights and wave to supporters at the headquarters of the Apple Daily newspaper, and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. Picture taken June 23, 2021. REUTERS/Lam Yik

Staff light their phone flashlights and wave to supporters at the headquarters of the Apple Daily newspaper, and its publisher Next Digital, after the announcement that it will print its last edition, in Hong Kong, China June 23, 2021. Picture taken June 23, 2021. REUTERS/Lam Yik

Staff members of Apple Daily and its publisher Next Digital leaves in Hong Kong, China June 24, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital pose with the final edition of Apple Daily at its headquarters in Hong Kong, China June 24, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital celebrate after finished the final edition of Apple Daily at its headquarters in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital pose with the final edition of Apple Daily at its headquarters in Hong Kong, China June 24, 2021. REUTERS/Tyrone Siu

People queue to buy copies of the final edition of Apple Daily, published by Next Digital, in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

A customer buys a copy of the final edition of Apple Daily, published by Next Digital, in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

Men read copies of the final edition of Apple Daily, published by Next Digital, in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

A man gestures as he brings copies of the final edition of Apple Daily, published by Next Digital, to a news stand in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

A costumer buys copies of the final edition of Apple Daily, published by Next Digital, in Hong Kong, China June 24, 2021. REUTERS/Lam Yik

Staff members of Apple Daily and its publisher Next Digital pose after the announcement it will print its last edition, in Hong Kong, China June 24, 2021. REUTERS/Tyrone Siu

Supporters gather outside the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 24, 2021. REUTERS/Tyrone Siu

Supporters gather outside the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 24, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital react on the day of the newspaper's final edition in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital react on the day of the newspaper's final edition in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital work on the final edition of their newspaper in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital work on the final edition of their newspaper in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

A staff member of Apple Daily and its publisher Next Digital works on the final edition of their newspaper in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

A staff member of Apple Daily and its publisher Next Digital works on the final edition of their newspaper in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital work on the final edition of their newspaper in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital work on the final edition of their newspaper in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Staff members of Apple Daily and its publisher Next Digital work on the final edition of their newspaper in Hong Kong, China June 23, 2021. REUTERS/Tyrone Siu

Supporters light their phone flashlights outside the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. REUTERS/Lam Yik

A supporter lights a phone flashlight outside the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. REUTERS/Lam Yik

Supporters light their phone flashlights outside the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. REUTERS/Lam Yik

Supporters light their phone flashlights outside the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. REUTERS/Lam Yik

Staff light their phone flashlights at the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. REUTERS/Lam Yik

Staff light their phone flashlights on the rooftop of the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. REUTERS/Lam Yik TPX IMAGES OF THE DAY

Staff light their phone flashlights at the offices of Apple Daily and its publisher Next Digital, after the announcement it will print its last edition, in Hong Kong, China June 23, 2021. REUTERS/Lam Yik