China will invite private investment to build infrastructure on islands it controls in the disputed South China Sea and will this year start regular flights to one of them, state media said Friday, moves likely to anger other claimants.

China claims almost all of the energy-rich waters of the South China Sea, through which more than $5 trillion of maritime trade passes each year. The Philippines, Brunei, Vietnam, Malaysia and Taiwan have overlapping claims.

In 2012 China set up what it calls Sansha city, based on Woody Island in the Paracels, to administer its islands there.