** Shares of Guangzhou Tinci Materials Technology SZSE:002709 climb 3.7% to 40 yuan, set for the biggest one-day pct gain since Nov 25
** China-based lithium-ion battery materials producer says its controlling shareholder Xu Jinfu has pledged not to reduce his holdings in the company in the next six months to reflect his confidence in the future development and long-term investment value of the firm
** YTD, stock up 102.7%, benchmark CSI 300 Index SZSE:399300 up 17.7%