He then went on to visit the 1,500-year Yungang Grottoes, a "treasure house" of artifacts featuring elements blending Chinese and foreign cultures, as well as cultures of China's ethnic minorities and the Central Plains.

Xi stressed that historical and cultural heritages are irreplaceable precious resources, and protecting them should always be put in the first place in tourism development.

Noting that tourism should not be over-commercialized, Xi said tourism should become a way for the Chinese to understand and appreciate the culture of the nation and enhance their cultural confidence.

The historical implications of communication and integration behind the Yungang Grottoes should be further explored to enhance the sense of community for the Chinese nation, said Xi.

During a research tour in a stainless steel manufacturer in the provincial capital Taiyuan on Tuesday morning, Xi said products and technology are the lifeline of businesses, calling for more efforts in technological innovation to make a greater contribution to the development of advanced manufacturing.

He also called on businesses to strictly implement epidemic prevention and control measures to ensure the safety and health of their workers, while promoting the resumption of work and production to make up for the time lost.

Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, waves to workers during a research tour in a stainless steel manufacturer in Taiyuan, capital city of north China's Shanxi Province, May 12, 2020. [Photo/Xinhua]

Later on, Xi went to check the ecological protection work of the Fenhe River in the city, and urged the incorporation of environment protection, energy revolution, green development, and economic transformation.

After hearing the work reports of the CPC Shanxi Provincial Committee and the provincial government on Tuesday afternoon, Xi stressed that no relaxation is allowed in epidemic prevention and control, noting that efforts should be made to guard against both imported infections and domestic rebounds, improve regular prevention and control mechanism, and prevent new outbreaks.

Xi called for efforts on more promptly and effectively addressing the difficulties faced by enterprises in resuming production and operation, on solid implementation of all the policies and measures for expanding domestic demand, and on strengthening the competitiveness and quality of the real economy, especially the manufacturing industry.