Trading in shares of Hong Kong’s Next Digital Ltd. was suspended on Monday and worries grew over the pro-democracy media group’s future, after the pro-Beijing local government froze assets of its jailed owner Jimmy Lai for political reasons under the Beijing-imposed national security law. The shares will remain on a trading halt ahead of a company announcement regarding the freeze in Lai’s assets, including his majority stake in the firm, Next Digital said. The move against Lai’s assets raises worries about the future of Next Digital, which he has been keeping afloat with loans, although the company’s CEO has said that the frozen assets have no link with its bank accounts. Given this is the first time a listed firm has been targeted under the new security law imposed by China in 2020, it also fuels concerns about the broader investment environment in the Asian financial hub. Lai, a democracy …