Shanghai Silda Scientific Instrument Co., Ltd. is a unit formed from the industrialization of the national scientific research project on the basic equipment for polymer intrinsic viscosity experiments - a precision constant temperature bath of 0.01C. This project was undertaken by Mr. Yao Hanke, a teacher and researcher in the field of automatic control at Shanghai Second University of Technology, in 1990. In 1992, it was appraised by the Shanghai Science and Technology Commission, ending the history of the lack of qualified basic equipment for viscosity experiments in China. Current Chief Engineer of the company. In the past 30 years, under the leadership of Mr. Yao, the company has also developed and produced a series of equipment for testing the common performance of polymers, with multiple technical patents and a high level of technical expertise. Each type of equipment has outstanding features and can replace imported products, making it the first choice for industry leaders and highly valued by some foreign enterprises. For over 20 years, some of the company's products have come with a 5-year free warranty and a 2-year free warranty service. In January 2015, Mr. Yao Hanchong's monograph "Common Testing Techniques and Automation for Polymer Properties" was published and distributed by the Chemical Industry Press (in 2012, Mr. Yao Hanli also published "The Western Beauty of China Impressions" commissioned by the China Photographers Association). Why does the company have such a decades long reputation? The company has all its own personnel for mechanical design, electronic circuit design, and computer software design. All component design and manufacturing are organized by the company, and there are no technical issues with long-term maintenance of user equipment. The reputation also benefits from the long-term stability of the company's technical designers and skilled workers. It is obvious to all that Shanghai Silda Scientific Instrument Co., Ltd. is a company that has never had white-collar or blue collar workers switch jobs to establish a new business, and it is also a company that has never had salespeople running around to sell products. It is true to facts. There are not many stable enterprises now. The stability of Shanghai Silda is attributed to the personal charm of Mr. Yao Hanchong, the current Chief Engineer of the company and the expert of the China Plastics Association Expert Committee, automatic control expert, and the completion of the precision constant temperature bath project. In some companies, personnel jump in and out, infringement disputes continue, and they sell similar products everywhere. What else can we talk about in terms of product quality and after-sales service? After all, this requires time to testify and a guarantee of the underlying strength. Society is becoming increasingly complex and requires discernment.