Enterprises have invested heavily in the construction of advanced sewage treatment and environmental protection systems, making full use of biological, microbial and other physical treatment methods to decompose and transform wastewater and waste gas. The discharge of wastewater and COD per ton of paper from the paper mills under Guangjin Paper is far below the minimum discharge standard stipulated by the state. At present, the world's most advanced papermaking technology and equipment introduced by Guangjin Paper Co., Ltd. has a high degree of water recycling, and the treated sewage can be used for watering flowers and raising fish without any problems. The water treated by its paper mill is recycled in the factory, a small part of which flows into the fish pond in the factory, and the rest is used for turf greening, flower irrigation, road cleaning and so on.