Chinese shares closed lower in the morning trading session on Friday, with the benchmark Shanghai Composite Index plunging 4.06 percent to finish at 4,344.06 points.
The Shenzhen Component Index dived 6.08 percent to close at 14,738.91 points.
The ChiNext Index, tracking China's Nasdaq-style board of growth enterprises, slumped 7.82 percent to end at 2,955.53 points.
During Friday's morning session, losers outnumbered winners by 908 to 34 in Shanghai, and by 1,365 to 40 in Shenzhen.
Stocks of communications, Internet plus, medical care, and transportation were biggest losers.
