(Yicai Global) Dec. 23 -- China's mainland stock markets plunged in the afternoon and wiped out almost all of last week's gains. Shenzhen's tech board fell the most.  

The Shanghai Composite Index closed 1.4 percent lower at 2,962.75. The Shenzhen Component Index was at 10,056.21, down 1.69 percent. The ChiNext Price Index, which tracks growth enterprises in Shenzhen, dropped 1.98 percent to 1,736.62.

Editor: Emmi Laine