China's Foreign Minister said non-regional countries should refrain from actions that might complicate the situation.
China's stocks declined as financial shares limped a day after its securities regulator widened efforts to stem the slide.
Chinese Foreign Minister Wang Yi and US Secretary of State John Kerry held talks on the sidelines of the ASEAN summit.
Kennedy Wong Ying-ho, a member of the Chinese People's Political Consultative Conference, faces corruption charges.
The Supreme People's Procuratorate will limit the prolonged detention of suspects to protect their rights.
China says the multilateral forum is not the ideal platform for resolving South China Sea row.
The Caixin China General Services Business Activity Index was at 53.8 in July.
A China Securities Investor Protection Funds survey finds investor confidence rising 6% from June and 1.9% from a year ago.
Claims of historical child sexual abuse involving former PM Edward Heath are being probed.
Japan's PM Shinzo Abe was told the US limits its surveillance of friendly nations.