Because the epidemic is the command, prevention and control is the responsibility. According to the deployment requirements of higher authorities on prevention and control of pneumonia in novel coronavirus.

A letter of commitment means that the promisor fully agrees with the offeror's offer and expresses it in writing. The terms in the letter of acceptance are the true meaning of the parties. The promised items shall not violate the prohibitive provisions of laws and regulations, public order and good customs, and shall not harm the interests of the state, the collective or the third party.

In order to give full play to the role of the certification body, promote the harmonious development of the market economy, consciously strengthen industry self-discipline, establish a good image of the certification body, and make the compulsory product certification, voluntary product certification and quality management system certification undertaken by this body be carried out in an orderly, legal and healthy manner, so as to highly guard against practice risks and avoid responsibilities, the commitment is made to the public:

1. Ensure that all substitute materials provided are true, complete and accurate;

Two, approved to replace the agency to ensure that every business engaged in strictly abide by the provisions of national laws, regulations and rules;