Filipino business tycoon Manuel Pangilinan talks to reporters following the launching of free Internet surfing service to millions of pre-paid subscribers of his telecommunications company at the financial district of Makati city, east of Manila, Philippines Friday. MANILA >> The chairman of a Philippine energy company said Friday a Chinese state-owned oil producer hasn't responded to a revived proposal to jointly explore a disputed area of the South China Sea but drilling will go ahead by 2016 with or without a partnership.