On August 22, the "International Summit of Underground Engineering and Tunnels in China 2011" was solemnly held at the Bolong International Hotel in Shanghai Blue Sea. Zhang Yan, Secretary-General of the Chinese Society of Civil Engineering, Qian Qihu, Academician of the Chinese Academy of Engineering, Jrgen Holst, former President of the Danish Tunnel Association, and Suchatvee Suwansawat, President of the Thai Underground Space and Tunnel Association, attended the meeting. Han Yali, General Manager of China Railway Equipment, was invited to attend the summit and gave a special speech entitled Key Technologies of Shield Design, Manufacture and Construction.

At the summit, the experts attended the meeting focused on the theme of "sustainable development of underground space and tunnel safety". On the hot topics and typical cases of the industry, they discussed the issues of underground construction, shield, fire protection, tunnel lighting, waterproofing, special materials, project management and other links, and combined with the requirements of sustainable development of underground space, carried out constructive and forward-looking discussions. 。

During the meeting, Han Yali, General Manager of China Railway Equipment, combined with the experience of China Railway Equipment in shield research and development and understanding of shield adaptability, put forward the problems that should be paid attention to in shield design, manufacture and construction from four aspects of shield construction: "eating in, spitting out, stabilizing and strict management", combined with specific construction cases and through the display of pictures and texts of PT. The design and manufacture of shield should take full account of geological conditions and combine the selection of shield with scientific geological exploration; the design and manufacture of shield should be bold and innovative, combining individuality with generality; the optimization of shield design and manufacture should pay attention to field information feedback and combine theory with practice; the construction of shield should be strictly managed, and shield should be maintained through standardized construction management and effective equipment maintenance. Construct the best performance to play out. By using popular and novel language, the speech made a thorough analysis of the relevant outstanding technical problems existing in the current application of shield, which was recognized and resonated with the participants. During this period, General Manager Han Yali also exchanged with experts from Thailand, Singapore and other countries on the situation of the subway market in Southeast Asia.

As one of the most influential and attentive large-scale tunnel summits in the infrastructure industry, General Manager Han Yali of China Railway Equipment was invited to attend the Summit and give a special speech, which fully reflects the further promotion of the popularity of China Railway Equipment in the industry, and also shows the scientific research strength and experience accumulation of China Railway Equipment in shield development and application.