Saudi Arabia, the United Arab Emirates (UAE), Bahrain and Egypt severed relations with the small Gulf Arab state on Monday. Qatar has denied the charges levelled at it.
Meeting on the sidelines of a regional security summit in Kazakhstan, Chinese Foreign Minister Wang Yi told Iranian Foreign Minister Mohammad Javad Zarif that peace and stability in the Gulf accords with the common interests of the region and the international community.
"China upholds that the relevant countries should appropriately resolve the disputes between them," the Chinese foreign ministry cited Wang as saying on Thursday.
The brief statement gave no other details of their talks over what the Chinese foreign ministry described as "the present situation in the Gulf region".
China has traditionally played little role in Middle East conflicts or diplomacy, despite its reliance on the region for oil.
In March, China played host to the Saudi king and Israeli prime minister in quick succession. China has close ties with Iran too.
The coordinated move against Qatar dramatically escalates a dispute over its support of the Muslim Brotherhood, the world's oldest Islamist movement, and adds accusations that Doha backs the agenda of regional arch-rival Iran.
(Reporting by Ben Blanchard; Editing by Richard Pullin)
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