(Yicai Global) Jan. 13 -- Stock markets on China's mainland were mostly lower at the lunch break, unable to sustain their upward arc after major indexes opened at a peak not seen in the past five years.

Lack of follow-up buying stalled the momentum. The Shanghai Composite Index was down 0.08 percent to 3,605.33 at the lunch break after going as high as 3622.35, its highest point since December 2015, within minutes after the market opened.

The Shenzhen Component Index lost 0.10 percent to 15,444.1, after streaking to 15,597.97 earlier in the morning, an apex unvisited since June 2015.

Shenzhen’s ChiNext Price Index, which tracks growth enterprises listed in the southern megacity, dropped 0.83 percent to 3,154.06. Its counterpart, Shanghai’s Nasdaq-style Star Market Board 50 Index, or Star 50, gained 0.06 percent to 1,406.02.

Editor: Ben Armour