MANILA, Philippines (AP) -- The Philippines and China, already locked in a territorial dispute, engaged in a diplomatic tussle Thursday, with the Philippine president canceling a visit to a trade fair in China after being told to stay away, and Beijing saying it never invited him in the first place.
A spokesman for the Philippine Department of Foreign Affairs, Raul Hernandez, said in a statement that President Benigno Aquino III had decided not to go ahead with the daylong visit to the China-ASEAN Expo scheduled for Tuesday in the southern city of Nanning.
Hernandez said China had invited the Philippines to send a high-level delegation to the trade fair a few months ago. Aquino said Wednesday that he would go, but word came from China later in the day that he should not come, Hernandez said.
"The president has decided not to proceed ... taking into consideration China's request for the president to visit China at a more conducive time," he said.
A Chinese Foreign Ministry spokesman said that Beijing had never asked Aquino to attend the expo.
"China never extended an invitation to the Philippine president," the spokesman told The Associated Press, speaking on routine condition of anonymity.
Speaking Wednesday, Aquino told reporters: "You may be surprised, I will travel next week. It's quite a long trip to China. I will leave at 5 in the morning and will be back at 5 in the afternoon."
"I don't want to overstay our welcome there," he added.
The Philippines is this year's "country of honor" at the trade fair, which takes place in China every year to highlight trade exchanges between Beijing and the 10-member Association of Southeast Asian Nations.
The Philippines and China have been embroiled in an increasingly antagonistic territorial dispute in the South China Sea.
Last year, China seized a shoal near the northwestern coast of the Philippines, and this year demanded that the Philippine navy withdraw from Second Thomas Shoal farther south.
The Philippines has further incensed China by seeking U.N. arbitration to solve the disputes.
Dwarfed by China's mammoth military, the Philippines also has started negotiations with Washington to allow a larger number of U.S. troops to have access to local military camps, where they could also pre-position ships, assault helicopters and high-tech surveillance aircraft like the P3 Orion in close proximity to the South China Sea.
China sought to use economic pressure to sway Manila, and in the latest sign of Beijing's growing assertiveness, recently reorganized its coast guard to beef up its ability to police its maritime claims.
The visit's cancellation was announced as China was hosting ASEAN foreign ministers ahead of talks in China next month on how to implement a 2002 agreement on peacefully handling disagreements.
Referring to the South China Sea territorial dispute, Thai Foreign Minister Surapong Tovichakchaikul told reporters that ASEAN anticipated the September discussions would be "constructive and substantive."
ASEAN nations have been pushing for a code of conduct governing interactions in the area, but China has been reluctant to negotiate with the group as a whole, preferring to deal with nations bilaterally as a way of bringing its full size, economic influence, and political heft to bear on its much smaller neighbors.
China claims virtually the entire South China Sea and its island groups on historical grounds. The Philippines, Vietnam, Brunei, Malaysia and Taiwan have rejected that, sparking fears that the disputes might turn violent and set off an armed conflict.
Chinese Foreign Minister Wang Yi reiterated China's reluctance to discuss territorial disputes with ASEAN as a bloc, while emphasizing the importance Beijing places on regional stability.
"We do not believe one individual position should replace that of ASEAN, and cannot let our own individual relations be affected by one's selfish interests," Wang said.
Associated Press writers Jim Gomez in Manila and Christopher Bodeen in Beijing contributed to this report.