On April 8, 2016, the delegation of Hanoi Sewerage Company had a tour of the factory of Hiep Hoa Special purpose Vehicle Co., Ltd. After being introduced and explained in detail about each type of vehicle by the General Director of Hiep Hoa Company - Mr. Dao Manh Hung, Hanoi Sewerage Company decided to order a number of sewer sludge vacuuming trucks from Hiep Hoa Company. for upcoming projects