Chinese tech stocks tumbled in Hong Kong as traders looked for signals China will halt its year-long crackdown on the sector. HSBC and Ping An Insurance advanced amid calls to break up the lender’s Asian operations. The Hang Seng Index was little changed at 21,101.89 at the close of trading, after earlier sliding by as much as 2.1 per cent. The Tech Index lost 1.4 per cent, paring an earlier slump of as much as 4.6 per cent amid steep losses in Alibaba Group and JD.com. Financial markets in mainland China will remain closed through Wednesday. Tech stocks surrendered some…