A mainland Chinese court has claimed jurisdiction over an investor lawsuit against a Hong Kong-listed firm for the first time, with the move likely to increase scrutiny of corporate disclosures.Mainland investors filed the lawsuit with the Beijing Financial Court, alleging that an overseas-incorporated company had failed to disclose irregular loans, unauthorised guarantees and related-party transactions in 2017 and 2018, in violation of Hong Kong’s listing rules, according to a recent report by...