From the launch of Tianhe Core Module in April 2021 to the Shenzhou XV mission, China will complete the "T" basic configuration assembly and construction of the space station as scheduled within 19 months. On November 28, the press conference of Shenzhou 15 manned mission was held at Jiuquan Satellite Launch Center. Ji Qiming, spokesman for China's manned space program and assistant director of the China Manned Space Program Office, said that from the launch of the Tianhe Core Module in April 2021 to the Shenzhou 15 mission, China's manned space program will intensively carry out 11 launches, two spacecraft returns, seven astronauts exit the space, 12 astronauts from four flight crews will continue to stay in orbit, and the assembly and construction of the "T" basic configuration of the space station will be completed as scheduled in 19 months, The whole process is interlinked, integrated and perfect, demonstrating the heavy accumulation and strong strength of China's 30-year development of manned spaceflight, and the acceleration of China's space development in the new era. Ji Qiming said that the basic configuration of the Chinese space station "T" was assembled in less than two years, mainly for five reasons. First, the centralized and unified leadership of the Party Central Committee. Achieving success provides fundamental compliance and strong motivation. Second, the institutional advantages of the new national system. Thousands of units and hundreds of thousands of scientific researchers across the country have made great efforts to coordinate and pool their wisdom to tackle key problems, which has gathered a strong joint force to ensure success and promote development. Third, the development of the project has always adhered to self-reliance and independent innovation, and has broken through and mastered a large number of core key technologies with independent intellectual property rights. The localization rate of the components and core components has reached 100%, and a path of manned space development with Chinese characteristics has been blazed out. Fourth, scientific and efficient project specific management. Always adhere to the guidance of system engineering theory, strengthen top-level design and overall priority, adhere to the organic unity of technology, progress and resources, adhere to quality first and safety first, and ensure that the space station construction task is effectively promoted and won consecutive battles. Fifth, spiritual inheritance and fine style. The whole project adheres to the spirit of "two bombs and one satellite" and manned spaceflight, and is not afraid to bear hardships, face difficulties, tackle key problems tenaciously, and make selfless contributions. Especially in the past three years, it has overcome the difficulties caused by the COVID-19, and ensured the smooth implementation and completion of the space station construction task on schedule. (Liu Xinshe)