The Hang Seng Index rose 0.1 per cent to 25,530.40 as of 10.12am local time, holding onto a gain of 1.9 per cent so far this week. The Hang Seng Tech Index dropped 0.1 per cent.
On the mainland, the CSI 300 Index slipped 0.4 per cent and the Shanghai Composite Index retreated 0.5 per cent.
Car dealer Zhongsheng Group Holdings surged 7.6 per cent to HK$18.04 and Chow Tai Fook Jewellery Group advanced 3 per cent to HK$15.65 after gold prices rose to a record high. Baidu gained 2.6 per cent to HK$93.85 and Alibaba Group Holding added 0.7 per cent to HK$135.70.
Mainland investors have stepped up buying of Hong Kong stocks in a hunt for more attractive investments after a liquidity rally drove the Shanghai Composite Index to a decade high last week. Hong Kong shares are now about 20 per cent cheaper than mainland stocks in terms of valuations, according to a Hang Seng gauge tracking the price gap between the two markets.