Chemistry professionals from Ciro Redondo Project Department in Cuba, have entered the job site since July 19th to overcome the 12-hour time difference. Under the leadership of the chemical specialist, they actively cooperate with the personnel of commissioning and power construction units to inspect the chemical water-making system, ultrafiltration, primary and secondary reverse osmosis and EID equipment. Under the condition of doing well the safety risk measures of debugging and cross-operation of infrastructure, Project Department overcome the hot weather at 40℃, and through the joint efforts of various units, the qualified desalted water was produced at 16:00 on July 29th. It laid a solid foundation for the follow-up debugging of the project which was praised by the general contractor.