China says a pair of civilian jet airliners landed at one of its newly created islands in a disputed section of the South China Sea in test flights to see whether its airship was up to standard.Wednesday's test flights followed one over the weekend that marked the first trip to Fiery Cross Reef,which brought a protest from fellow claimant Vietnam. China's creation of seven new island by piling sand on reefs and atolls has been condemned by its neighbours and the United States,which says China is raising tensions in an area where six governments share overlapping maritime territorial claims.