The proposed merger would mark the first business-line integration between the two banks. FILE PHOTO: A logo of HSBC is seen on its headquarters at the financial Central district in Hong Kong, China August 4, 2020. M&A Create Bookmark Hang Seng investment arm to merge with HSBC's asset business, sources say The proposed merger would mark the first business-line integration between the two banks Summer Zhen, Selena Li | Reuters News HONG.