Tiancheng Lou, co-founder and Chief Technology Officer (CTO) of the autonomous driving technology startup Pony.ai, attends an event in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

A safety driver monitors a Lexus vehicle equipped with Pony.ai's autonomous driving system as the car drives on a road during a test event, in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

A logo of Pony.ai is seen on a Lexus vehicle equipped with the company's autonomous driving system, which will serve as a robotaxi, in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

A Lexus vehicle equipped with Pony.ai's autonomous driving system drives on a road during a test event, in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

A member of the media steps off a Lexus vehicle equipped with Pony.ai's autonomous driving system during a test event, in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

A Lexus vehicle equipped with Pony.ai's autonomous driving system drives on a road during a test event, in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

A logo of the autonomous driving technology startup Pony.ai is seen on a screen during an event in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

James Peng, founder and CEO of the autonomous driving technology startup Pony.ai, attends an event in Beijing, China May 13, 2021. REUTERS/Tingshu Wang

A truck transports new Tesla cars at its factory in Shanghai, China, May 13, 2021. REUTERS/Aly Song

A Tesla sign is seen at its factory in Shanghai, China, May 13, 2021. REUTERS/Aly Song

A truck transports new Tesla cars at its factory in Shanghai, China May 13, 2021. REUTERS/Aly Song

The Xiaomi logo is seen at a Xiaomi shop, in Shanghai, China May 12, 2021. REUTERS/Aly Song

The Xiaomi logo is seen at a Xiaomi shop, in Shanghai, China May 12, 2021. REUTERS/Aly Song

The Xiaomi logo is seen at a Xiaomi shop, in Shanghai, China May 12, 2021. REUTERS/Aly Song

Yu Haibin, China's National Narcotics Control Commission official, speaks during a news conference in Beijing, China May 11, 2021. REUTERS/Carlos Garcia Rawlins

Yu Haibin, China's National Narcotics Control Commission official, speaks next to Deng Ming, deputy director of China's National Narcotics Control Commission, during a news conference in Beijing, China May 11, 2021. REUTERS/Carlos Garcia Rawlins

Deng Ming, deputy director of China's National Narcotics Control Commission speaks during a news conference in Beijing, China May 11, 2021. REUTERS/Carlos Garcia Rawlins

Deng Ming, deputy director of China's National Narcotics Control Commission attends a news conference in Beijing, China May 11, 2021. REUTERS/Carlos Garcia Rawlins

Deng Ming, deputy director of China's National Narcotics Control Commission speaks during a news conference in Beijing, China May 11, 2021. REUTERS/Carlos Garcia Rawlins

Deng Ming (C), deputy director of China's National Narcotics Control Commission attends a news conference in Beijing, China May 11, 2021. REUTERS/Carlos Garcia Rawlins

China's Commissioner of the National Bureau of Statistics Ning Jizhe briefs the media about the outcome of last year's once-in-a-decade census during a news conference in Beijing, China, May 11, 2021. REUTERS/Thomas Peter

China's Commissioner of the National Bureau of Statistics Ning Jizhe briefs the media about the outcome of last year's once-in-a-decade census during a news conference in Beijing, China, May 11, 2021. REUTERS/Thomas Peter

China's Commissioner of the National Bureau of Statistics Ning Jizhe briefs the media about the outcome of last year's once-in-a-decade census during a news conference in Beijing, China, May 11, 2021. REUTERS/Thomas Peter

People walk at a subway station, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 11, 2021. REUTERS/Aly Song

People walk at a subway station, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 11, 2021. REUTERS/Aly Song

People walk at a subway station, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 11, 2021. REUTERS/Aly Song

People board a train at a subway station, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 11, 2021. REUTERS/Aly Song

People walk at a subway station, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 11, 2021. REUTERS/Aly Song

Journalists line up to pick up a copy of China's National Bureau of Statistics population census report before a news conference in Beijing, China, May 11, 2021. REUTERS/Thomas Peter

Journalists pick up a copy of China's National Bureau of Statistics population census report before a news conference in Beijing, China, May 11, 2021. REUTERS/Thomas Peter

Journalists pick up a copy of China's National Bureau of Statistics population census report before a news conference in Beijing, China, May 11, 2021. REUTERS/Thomas Peter

Journalists pick up a copy of China's National Bureau of Statistics population census report before a news conference in Beijing, China, May 11, 2021. REUTERS/Thomas Peter

A woman walks along Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People walk along Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People walk along Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People walk along Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People ride scooters at Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People walk along near the Bund, in front of Lujiazui financial district of Pudong, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People walk along Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

Paramilitary police officers stand guard at Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

Woman ride bikes on a street, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People walk along Nanjing Pedestrian Road, a main shopping area, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

People walk along at a street, following the outbreak of the coronavirus disease (COVID-19), in Shanghai, China May 10, 2021. REUTERS/Aly Song

A traveller walks at the Beijing Capital International Airport in Beijing, China May 9, 2021. REUTERS/Tingshu Wang

Travellers walk at the Beijing Capital International Airport in Beijing, China May 9, 2021. REUTERS/Tingshu Wang

Travellers are seen in front of an airplane of Hainan Airlines at the Beijing Capital International Airport in Beijing, China May 9, 2021. REUTERS/Tingshu Wang

A woman takes pictures in front of an airplane at the Beijing Capital International Airport in Beijing, China May 9, 2021. REUTERS/Tingshu Wang

A sign of Chinese online insurance technology firm Waterdrop Inc is pictured ahead of the company’s U.S. initial public offering (IPO) on New York Stock Exchange (NYSE), in Beijing, China May 7, 2021. REUTERS/Tingshu Wang

A sign of Chinese online insurance technology firm Waterdrop Inc is pictured ahead of the company’s U.S. initial public offering (IPO) on New York Stock Exchange (NYSE), in Beijing, China May 7, 2021. REUTERS/Tingshu Wang

A man walks past a billboard with signs of Tencent-backed Chinese online insurance technology firm Waterdrop Inc ahead of the company’s U.S. initial public offering (IPO) on New York Stock Exchange (NYSE), in Beijing, China May 7, 2021. REUTERS/Tingshu Wang

Shen Peng, founder and CEO of Chinese online insurance technology firm Waterdrop Inc, speaks during an interview with Reuters ahead of the company’s U.S. initial public offering (IPO) on New York Stock Exchange (NYSE), in Beijing, China May 7, 2021. REUTERS/Tingshu Wang

Shen Peng, founder and CEO of Chinese online insurance technology firm Waterdrop Inc, poses for pictures during an interview with Reuters, ahead of the company’s U.S. initial public offering (IPO) on New York Stock Exchange (NYSE), in Beijing, China May 7, 2021. REUTERS/Tingshu Wang

A Chinese national flag flies outside the former Xinqu Mosque that had its minarets and central dome removed in Changji outside Urumqi, Xinjiang Uighur Autonomous Region, China, May 6, 2021. Picture taken May 6, 2021. REUTERS/Thomas Peter

A Chinese national flag flies outside Kashgar Mosque that had its minarets removed in Changji outside Urumqi, Xinjiang Uyghur Autonomous Region, China, May 6, 2021. Picture taken May 6, 2021. REUTERS/Thomas Peter

Apartment towers rise behind the former Xinqu Mosque that had its minarets removed in Changji outside Urumqi, Xinjiang Uyghur Autonomous Region, China, May 6, 2021. Picture taken May 6, 2021. REUTERS/Thomas Peter

Two police officers request access to Sanqi Mosque in Changji outside Urumqi, Xinjiang Uyghur Autonomous Region, China, May 6, 2021. Picture taken May 6, 2021. REUTERS/Thomas Peter

A part of a minaret broken off from the former Xinqu Mosque lies near a Chinese national flag in a yard adjacent to the former house of worship in Changji outside Urumqi, Xinjiang Uyghur Autonomous Region, China, May 6, 2021. Picture taken May 6, 2021. REUTERS/Thomas Peter

A Chinese national flag flies outside Jiankang West Road Mosque that had its dome and minarets removed in Changji outside Urumqi, Xinjiang Uyghur Autonomous Region, China, May 6, 2021. Picture taken May 6, 2021. REUTERS/Thomas Peter

Police officers from National Security Division are seen inside Chickeeduck store, in Hong Kong, China May 6, 2021. REUTERS/Lam Yik

Police officers from National Security Division are seen inside Chickeeduck store, in Hong Kong, China May 6, 2021. REUTERS/Lam Yik