BEIJING ¨C Beijing Xiangshan Forum, China¡¯s biggest annual show of military diplomacy, started on Sunday although the Asian power is still missing a defense minister, who typically hosts this event.

China hopes to use the forum to promote President Xi Jinping¡¯s vision for a safer world and draw developing countries closer, as it faces increased coordination between the United States and its allies to curtail its military ambitions.

Russia, which started a war in Ukraine in 2022, is being given center stage at the forum. Russian Defense Minister Sergei Shoigu is listed in the forum¡¯s agenda as the first guest speaker at Monday¡¯s opening ceremony.

The U.S. Defense Department has sent a delegation led by Xanthi Carras, China country director in the Office of the Undersecretary of Defense.

This year¡¯s forum takes place at an awkward time for China when it is without a defense minister, whose main role is to engage with foreign militaries.

On Tuesday, Beijing sacked its defense chief, Li Shangfu, but did not name a replacement. Reports last month said that Li, who has been missing for two months, was investigated for corruption.

Chinese military leaders more senior than the defense minister have filled in for Li. State media reported that Zhang Youxia and He Weidong, ranked Nos. 2 and 3 in the military, separately held bilateral meetings with the defense ministers from Laos, Mongolia and Vietnam on Saturday.

China¡¯s official Xinhua News Agency reported that the number and level of foreign participants, including 22 defense ministers and 14 military chiefs, are the highest this year since the forum was first held in 2006.

In particular, China is focusing its outreach to the Global South.

Zhao Yufei, an official with the event organizer, said the forum will call on developing countries to oppose bloc confrontation and a ¡°Cold War mentality,¡± which are two frequent criticisms Beijing have of the West.

Two defense diplomats whose countries have sent ministers said the forum offers a rare opportunity to engage with senior Chinese defense officials and military leaders to build trust that would be handy in times of crisis.

Concerned about how open the forum can be, many in the West have either shunned it or are only sending small and low-level delegations, preferring instead to discuss international security issues at the Shangri-La Dialogue held annually in Singapore.

Some European countries, including France, plan to send a small delegation from their defense ministries, according to sources familiar with the matter.

NATO¡¯s delegation will be led by Wendin Smith, its security policy director, a NATO official said.