The outer tube of the stack is a reinforced concrete structure, 205 meters high, and the inner tube is a double-tube titanium steel tube, with a height of 210 meters and a total of 53 sections.
　　Hydraulic lifting system is used in the construction of steel inner cylinder. The construction of No. 1 steel inner cylinder began on July 1, 2018, and was completed on September 13, 2018, for a total of 75 days. The qualified rate of process test results is 100%, and the target of scheduled milestone is completed successfully.