DBS is the 6th largest foreign bank in China proper. It has a strategy of expansion into China. So have UOB and OCBC.
Well, its a tough biz to be in. Non-Chinese banks have only 2% market share. Even HSBC, StanChart and Citi have problems http://www.bloomberg.com/news/2012-06-04/china-wall-hit-by-global-banks-with-2-market-share.html
DBS, OCBC and UOB shld juz not bother abt China.