Trading in shares of Great Wall Motor was suspended on Friday, the Hong Kong exchange said, giving no further details.
The stock rose 6.9% to a record before steadying at HK$28.80 prior to the suspension, still up 6.7%, Reuters reported.
The automaker said it would sell a real estate development and construction materials distribution subsidiary to its controlling shareholder for CNY386.9m in a bid to focus on its core business.