FILE - In this Sept. 29, 2020, file photo, university students put up posters to demand of releasing the 12 Hong Kong activists detained at sea by Chinese authorities, at "Lennon Wall" in the University of Hong Kong. Lu Siwei, who represented one of 12 Hong Kong activists who tried to flee to Taiwan, had his license revoked by the Sichuan Provincial Justice Department in a formal notice given Friday, Jan. 15, 2021. (AP Photo/Kin Cheung, File)

In this photo taken by Ren Quanniu, Ren Quanniu, right, and other supporters of lawyer Lu Si Wei pose for a group photo in Chengdu in southwestern China's Sichuan Province, Wednesday, Jan. 13, 2021. A Chinese lawyer who represented a Hong Kong pro-democracy activist was stripped of his law license on Friday, Jan. 15, 2021 amid efforts by Beijing to crush opposition to its tighter control over the territory. (Ren Quanniu via AP)

FILE - In this Dec. 10, 2020, file photo, pro-democracy activists Leung Kwok-hung, left, and Raphael Wong Ho-ming holding placards, demand the release of the 12 Hong Kong activists detained at sea by Chinese authorities as they march to the Chinese central government's liaison office, in Hong Kong. A Chinese lawyer who represented a Hong Kong pro-democracy activist was stripped of his law license on Friday, Jan. 15, 2021, amid efforts by Beijing to crush opposition to its tighter control over the territory. The placards read "Never forget our brothers" and "Hope 12 Hong Kong activists come home soon." (AP Photo/Kin Cheung, File)

FILE - In this Dec. 28, 2020, file photo, a pro-democracy activist holds a placard to demand the release of the 12 Hong Kong activists detained at sea by Chinese authorities to demand the release of the 12 Hong Kong activists detained at sea by Chinese authorities outside the Chinese central government's liaison office in Hong Kong. A Chinese lawyer who represented a Hong Kong pro-democracy activist was stripped of his law license on Friday, Jan. 15, 2021, amid efforts by Beijing to crush opposition to its tighter control over the territory. (AP Photo/Kin Cheung, File)