China stocks fall on liquidity stress, Hong Kong also down

China stocks fell on Tuesday morning as Beijing's move to tighten supervision of shadow banking activities and persistent liquidity concerns restrained risk appetite. Hong Kong stocks also lost ground, as Wall Street strength was eclipsed by weakness in mainland companies listed in Hong Kong. The Hong Kong China Enterprises Index, which tracks Hong Kong-listed Chinese firms, lost 0.7 percent, to 9,313.70 points, in line with mainland peers.