U.S. Secretary of State Marco Rubio heads this weekend to meetings of Asia-Pacific countries in Manila, where he is expected to meet with his Chinese counterpart to prepare a possible September summit between Chinese leader Xi Jinping and U.S. President Donald Trump.

Russian Foreign Minister Sergey Lavrov is also expected to be in Manila next week ?for meetings involving the 11-member Association of Southeast Asian Nations (ASEAN) along with the Chinese foreign minister, Wang Yi, and ?ministers from ?Japan, Australia, Canada and Britain.

The gatherings come at a time of global instability, with the Iran ?war disrupting global trade and creating economic stress across Asia.