The police also arrested two people on charges of espionage.
With 14 days to go until the election, a look back at the journeys of candidates Hillary Clinton and Donald Trump.
Xi is expected to be endorsed as a "core" leader whose authority will not be challenged.
China's maritime safety administration orders other ships to stay away from the region.
The US has around 50,000 troops in the Philippines as a counterbalance against Chinese influence in the region.
Officials will also discuss the overall bilateral relations between the two allies.
Duterte changes his opinion and says he will not sever diplomatic ties with the United States.
Lee places wreath at the Royal Urn in the Dusit Maha Prasat Throne Hall.
Philippines presidential office urges public to wait for the final guidelines before interpreting Duterte's stance on US.
Princess Sirindhorn is the most popular of late king Bhumibol's children.
Duterte reached Beijing on Tuesday with the aim of paving the way for what he calls a new commercial alliance.
China's demand from the Philippines, if any, is not clear yet in exchange for the fishing concession.
The government says Airbus EC 130 T2 helicopter was carrying an instructor and two trainee pilots when it disappeared.
The President is also scheduled to witness the operation preparations for Air Tractor AT-802 in Yahukimo.
President is taking a business delegation of more than 200 along with him, and expects to sign agreements with Beijing