Rigs_and_VesselsChina in the market for deep-water drillshipTender to be issued by early May for drilling and surveying unit able to drill up to 11,000 metresExperience: the GMGS wants to see Chinese shipyards building bigger drillships, building on experience such as Shanghai Shipyard's track record with the drillship Tiger 1Photo: OPUS OFFSHOREXu YiheSingapore