A deep waterproof curtain was recently finished by the Dongying Zhongjian Infrastructure Engineering Co for the Zhenghe Petrochemical (Group) Co in the Xiaoqinghe River to the east of Zhenghe’s warehousing and transport department. New technology was used in construction of dual-piling, deep, waterproof curtain. Each of the piles is pounded at least 10 meters into the ground to prevent any water leakage. During the construction work, Zhenghe Petrochemical communicated with the engineering company constantly on the best engineering approach and the time. The work was completed before the arrival of the rainy season. During the construction work, the company assigned employees to monitor the progress, and, before the start of the project, it provided plenty of road lights and firefighting equipment. The project was completed on time after around 20 days.