On the morning of April 23rd, Wang Yonghong, President of Guangdong Provincial Academy of Environmental Sciences, and a delegation of five people visited our school to investigate the construction of our laboratory. Zhu Nengwu, vice dean, Yin Yurong, director of the experimental center, and Chen Li'e, office director, participated in the investigation. At the meeting, vice dean Zhu Nengwu introduced in detail the experience gained in the construction and operation of our laboratory for many years, and the teachers engaged also had a active communication with the leaders and teachers of the Academy of Environmental Sciences.