South China SeaManila confronts Beijing 5 years after South China Sea ruling
US and allies invoke Philippine 2016 arbitration victory to pressure China
The Philippine Coast Guard used rubber dinghies to inspect Chinese vessels moored at Whitsun Reef in the South China Sea in April. (Photo by Philippine Coast Guard/AP)
CLIFF VENZON, Nikkei staff writer
MANILA -- Patrolling the disputed South China Sea on June 30, a Philippine Coast Guard vessel approached a ship and blasted a radio warning: "You are within the Philippine exclusive economic zone. You are required to provide the following: name of vessel, intention, last and next port of call."