-A national super large enterprise which is responsible for petroleum refining and producting ethylene, chemical fiber ·Monitored the data of the external integrated unit at the operating room of aromatics workshop·Conducted chemical experiments by learning relevant literature at quality inspection shop

-The first batch of Chinese time-honored enterprises, it has two major chemical product series including ink and surfactant. The production and sales volume of printing ink always ranks first in China·Writed surfactant research report (149 pages). Researched related literature, analyzed the company's annual financial statements and summarized the development trend, national policy, business model, market space, etc. And deeply analyzed its core competitiveness and sustainable profitability, finally put forward some strategic suggestions·Modified the ISO9001 quality management system and environment management system manual·Participated in the application for recognition and reward of "specialized, special and new" products of small and medium-sized enterprises in Tianjin