Beijing has sought to build closer ties with Arab states in recent years, and last year brokered a detente between Tehran and its long-time foe Saudi Arabia.

It has also historically been sympathetic to the Palestinian cause and supportive of a two-state solution to the Israeli-Palestinian conflict.

And Beijing last month hosted rival Palestinian groups Hamas and Fatah for "in-depth and candid talks on promoting intra-Palestinian reconciliation".

Egypt's President Abdel Fattah al-Sisi and UAE President Sheikh Muhamad bin Zayed Al Nahyan, as well as a host of other regional leaders and diplomats, are among the delegates attending the forum.

President Xi Jinping is set to deliver a keynote speech at the opening ceremony on Thursday, Beijing has said, aimed at building "common consensus" between China and Arab states.

Top of the agenda will be the war between Israel and Hamas, which Xi has called for an "international peace conference" to resolve.

China sees a "strategic opportunity to boost its reputation and standing in the Arab world" by framing its efforts to end that conflict against US inaction, Ahmed Aboudouh, an associate fellow with the Chatham House Middle East and North Africa Programme, told AFP.

"This, in turn, serves Beijing's focus on undermining the US's credibility and influence in the region," he said.

"The longer the war, the easier for China to pursue this objective," he added.

On Tuesday, Foreign Minister Wang Yi met with counterparts from Yemen and Sudan in Beijing, saying he hoped to "strengthen solidarity and coordination" with the Arab world.

He also raised China's concerns over disruptive attacks on Red Sea shipping by Iran-backed Huthi forces acting in solidarity with Hamas with his Yemeni counterpart Shayea Mohsen al-Zindani.

"China calls for an end to the harassment of civilian vessels and to ensure the safety of waterways in the Red Sea," state news agency Xinhua quoted him as saying.