President Xi Jinping on Friday called on all countries to strengthen openness and cooperation in science and technology.

Xi made the remarks while delivering a speech via video at the opening ceremony of the 2021 Zhongguancun Forum, a key national platform for opening-up and innovation.

The speech was the second time Xi has conveyed his messages to the forum, which was launched in 2007.

He sent a congratulatory message to the forum in 2019, highlighting the significance of hosting the forum to enable discussions on cutting-edge technology, future industry growth trends and ways to help nations share innovative ideas and development concepts.

This year's forum, under the theme of Intelligence, Health and Carbon Neutrality, will run from Friday through Tuesday.

The event will include conferences, technology transactions, innovation competitions, exhibitions and other activities. It will bring together foreign leaders, the world's top scientists and Nobel laureates as well as business leaders and investors, Jin Wei, vice-mayor of Beijing, said at a news briefing earlier this month.

Zhongguancun, an area in northwestern Beijing often referred to as China's "Silicon Valley", is home to the country's top universities, research institutions and high-tech companies.