TAIPEI : Taiwan financial conglomerate Taishin said it would raise its offer for peer Shin Kong by 25 per cent to about T$222.4 billion ($7 billion), in a deal that would be Taiwan's biggest-ever financial services industry merger. Taishin and Shin Kong's long-mooted tie-up, announced last month, has had to contend with an unexpected rival bid from CTBC Financial to acquire Shin Kong, though the target says it views Taishin as its preferred bidder. Taiwan's financial services industry tends to