CMB International Securities, the Hong Kong investment arm of China Merchants Bank, has launched round-the-clock trading of Bitcoin, Ether and Tether, becoming the first Chinese banking group to offer a regulated virtual-asset service in the city. The platform allows investors to buy and sell the three tokens 24 hours a day, seven days a week. China Merchants Bank, ranked as the world’s eighth-largest lender by assets, is seeking to tap growing demand for digital assets while remaining within Hong Kong’s regulatory framework for virtual-asset intermediaries.