1936: BOC opened a branch in Singapore to handle remittances to China of overseas Chinese. It also opened an agency in New York.
1946: BOC reopened its branches and agencies in Hong Kong, Singapore, Haiphong, Rangoon, Kuala Lumpur, Penang, and Jakarta. It moved the Hanoi agency to Saigon. At the suggestion of the Allied Forces Headquarters, it liquidated the branch in Osaka and opened a sub-branch in Tokyo.
1950: After victory of Communist forces in the civil war, some branches (ex. Hong Kong, Singapore, London, Penang, Kuala Lumpur, Jakarta, Calcutta, Bombay, Chittagong, Karachi, and Jakarta) of Bank of China joined the bank headquartered in Beijing, while others (ex. New York, Tokyo, Havana, Bangkok, and one other, possibly Panama) opted to remain with the Bank of China headquartered in Taipei. In 1971, this bank took the name International Commercial Bank of China.