OPEC chief stresses energy cooperation with ChinaGreek athletes excited to attend Chengdu UniversiadeCargo throughput of Rizhao Port sees 6.7 pct ySingapore PM Lee to step down on May 15 and hand power to his deputyScientists say coral reefs around the world are experiencing mass bleaching in warming oceansHamas chief reaffirms commitment to ceasefire demandsSurging popularity of Chinese books at Bangkok Int'l Book FairChina rolls out tasks to foster improved online environmentSeason of flowers: Bullet trains bound for spring in XizangAsian film festival welcomes week of Chinese works