By Lawrence White and Anshuman Daga LONDON/SINGAPORE (Reuters) – HSBC Holdings’s largest shareholder, Chinese insurance giant Ping An, has called for a break-up of the London-based bank, a source familiar with the matter said on Friday. Ping An has set out its plan to split the company to HSBC’s board, according to earlier media reports, which also cited people familiar with the matter. Ping An declined to comment. HSBC did not comment on Ping An’s involvement, but defended its overall strategy in a statement on Friday. “We believe we’ve got the right strategy and are focused on executing it,”…