If Yu Chen receives a letter of concern from the Shenzhen Stock Exchange, it is required to combine the company's main business, future development plan, main business, core competitiveness, and industry development trend, etc. explain the necessity and rationality of co-investment between the company and related parties, and whether it leads to inter-industry competition with the controlling shareholder and its related parties. Explain whether the sample biology and its employees have the relevant qualifications for medical beauty services and product production and sales, whether the business is legal and in compliance with the regulatory regulations and requirements of the relevant industry, and so on.