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"China has always been committed to international cooperation on vaccine development and has joined a number of multilateral initiatives such as WHO's Access to COVID-19 Tools Accelerator and COVAX. We will continue to engage in active discussions with all parties on international cooperation on vaccine development," Wang said.

Li stressed the need to expand two-way opening up and investment, stay committed to fostering an open world economy, and safeguard the smooth operation of global industrial and supply chains.

He stressed deepening the Asia-Pacific partnership featuring mutual trust, inclusiveness, cooperation, and mutual benefit, and "making the pie of cooperation even bigger" to achieve common prosperity.

"To contain the virus, stabilize the economy and protect livelihood remains a long and arduous journey for all countries," Xi said. "While containing the virus, we must also stabilize and restore economic growth."

BEIJING, Nov. 20 (Xinhua) -- Chinese President Xi Jinping sent a congratulatory letter to the Understanding China Conference 2020 that opened Friday in Guangzhou, south China's Guangdong Province.