Chinese President Xi Jinping has urged the country's state-level economic and technological development zones to continuously stimulate innovation vitality and endogenous momentum and promote high-standard opening up for in-depth reform and high-quality development.

Xi, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, made the remarks in a recent instruction on the work of such development zones.

Xi said that over the past 40 years, the country's state-level economic and technological development zones have made positive contributions to the establishment of new systems for a higher-level open economy, coordinated regional development and high-quality development.

He urged such development zones to focus on Chinese modernization, continuously stimulate innovation vitality, and promote in-depth reform and high-quality development with high-level opening up.

Efforts must be made to actively participate in high-quality Belt and Road cooperation, expand international cooperation, and innovate investment promotion methods, aiming to build "Invest in China" into a brand itself, he said.

Xi also called for consolidating and improving the industrial foundation of advanced manufacturing, promote high-end, green and digital industries, create digital and future industries, and develop new quality productive forces according to local conditions.

A symposium marking the 40th anniversary of the country's state-level economic and technological development zones was held in Tianjin on Sunday. Chinese Vice Premier He Lifeng conveyed Xi's instruction and delivered a speech at the meeting.