A-share oil and gas exploration and services sector extended gains. Lanyan
Holdings and Zhongman Petroleum hit daily up-limits; Tongyuan Petroleum jumped
over 20%; Qianneng Hengxin and Keli Co. rose more than 15%; Shouhua Gas climbed
over 10%. New Natural Gas, Sinopec Oilfield Service, Haiyou Development, Xinchao
Energy and Zhongyou Engineering also advanced.