言信洁净室系统工程理念：规范、适用、超前、经济、耐久。

Guideline of Yanxin Cleanroom System Project:
To insure our Cleanroom System standard, suitable, modern, economical and durable.

言信洁净室系统工程一直沿用国际最新的标准规范进行，确保建设的每一个洁净室达到国际验收标准。
Yanxin Cleanroom System has been following the newest international standards and assuring each solution of cleanroom to meet international acceptance criterions.

言信洁净室系统工程以客户为本，从不以规范标准验收合格为工程合格唯一标准，言信一直认为，客户满意的洁净室才是真正合格的洁净室。
Yanxin Cleanroom System is customer-oriented, never regard meeting the acceptance condition as the only standard, but make the cleanroom meet customer’s requirements.

在言信，我们要求每一个设计师、工程师对自己设计及施工过的工程进行回访，不管十年前，还是二十年前，不管当时验收时是得到多么的肯定，都不另外。这不仅仅是我们良好售后服务的体现，更重要的是通过这些回访，让每一个言信人了解自己设计及施工的工程，在使用的过程中有什么优点和不足，为现在的设计及施工提供宝贵的经验。因此，言信设计施工的工程都以适用性、耐久性而闻名行业。
Yanxin requires each designer and engineer to return visit the project designed or constructed by themselves without expense, no matter when the projects were accepted, ten years ago or twenty years ago. It not only reflects our good after-sales service, but also enables each employee of Yeshine to understand the process of design and construction, to differentiate the good and bad points in using and to offer more valuable experience for the current design and construction. Therefore, the Yanxin design and construction is well-known for its applicability and durability.

言信要求每一个设计师、工程师坚持不断学习新的知识。我们订阅了国内外行业科技杂志，经常请国内外专家及洁净室使用客户给大家讲课，并通过洁净室工程师同盟经常组织技术交流活动，为的就是不断充实丰富最前沿的行业知识，使用言信洁净室系统工程的设计及施工具有前瞻性，确保设计施工的洁净室数年甚至数十年不落后。
Yanxin requires each designer and engineer to keep on acquiring new technique and industry knowledge, so we subscribe many domestic and overseas science and technology magazines, and often invite domestic and foreign experts and users of cleanroom to give lectures and organize technological consultation activities via coalition of cleanroom engineers. In order to keep step with the development of technique, design and construction of cleanroom, we insist the above action from year to year.

言信企业拥有一流的现代化加工、一流的加工设备及一流的加工工人，我们的加工厂能生产出洁净室建设所涉及的大部分材料及配套设备，因些言信的洁净室系统工程具有非常好的性价比。用最合理的资金，建设最好质量的洁净室，一直是言信追求的目标。
Yanxin owns first-class modernized processing technologies, first-class processing facilities and first-class workman, and our processing factories are capable of producing most materials and corollary equipment involved in cleanroom project, which lead Yanxin Cleanroom System has a good cost performance. The ultimate goal of Yeshine is to construct cleanroom with the best quality and the most reasonable cost.