4. Construction is convenient and fast. Adopting an integrated structure, the wellbore can be cut and adjusted on site to meet various installation depth requirements, effectively reducing costs, greatly improving construction progress, and shortening the construction period by more than 10-20 times compared to traditional manhole covers; And it can be constructed 24/7. 5. Efficient drainage. The inner wall is smooth and flowing, equipped with a guide groove, which makes it difficult for dirt to accumulate and reduces the possibility of blockage. It has excellent drainage performance, and the rainwater and sewage discharge rate is 1-3 times that of traditional manhole covers. 6. Lightweight, easy to transport and install, reliable performance, strong load-bearing capacity; Strong adaptability and complete variety, can adjust the height of the wellbore and drill holes on the cylinder body freely, adjust the direction, and meet all the needs of engineering installation. 7. Low overall cost, low maintenance expenses, low transportation costs, and more advantages than traditional manhole covers; It can be recycled and reused, with huge social benefits. 8. Good sealing performance and leakage prevention. Due to the use of flexible connections, it is flexible and convenient, and can overcome harsh construction environments such as wind, dust, and sand. It can also overcome the difficulty of being unable to insert repeatedly due to the increase in road surface height. 9. Save materials. The integrated manhole cover replaces red brick cement with composite polymer processing materials, saving surface soil resources; The reduction in specifications used in residential buildings greatly saves the land space occupied by manhole cover installation.