The listed companies that do nucleic acid testing mainly include: Huada Gene (3676), Wanfu Bio (3482), Mingde Bio (2932), anke biotechnology (39), Hot View Bio (68868) and so on.

among the related concept stocks of nucleic acid detection, Changhong Technology, a wholly-owned subsidiary of the company, Shenzhen Baimingsheng Medical Device Co., Ltd. currently mainly provides supporting kits and consumables products for customers such as Huada Gene and Mindray Medical. Daan Gene, the company has obtained the medical device registration certificate of "novel coronavirus (219-nCoV) nucleic acid detection kit (fluorescent PCR method)".

the substance of nucleic acid detection is the nucleic acid of virus. Nucleic acid detection is to find out whether there is nucleic acid of foreign invading virus in respiratory tract samples, blood or feces of patients, so as to determine whether they are infected by Covid-19. To do a good job in normalization prevention and control, it is necessary to speed up the improvement of detection ability, so it is essential to carry out nucleic acid and antibody detection.

a listed company, according to the relevant provisions in section 5 of Chapter IV of the Company Law of the People's Republic of China, refers to a joint stock limited company whose publicly issued shares have been approved by the securities administration department authorized by the State Council or the State Council to be listed and traded on the stock exchange.

stock is the ownership certificate issued by a joint-stock company, and it is a kind of valuable securities issued by a joint-stock company to each shareholder as a holding certificate to raise funds and obtain dividends and bonuses.

each share represents the ownership of a basic unit of the enterprise by shareholders. Every listed company will issue shares.

every stock in the same category represents equal ownership of the company. The share of ownership of the company owned by each shareholder depends on the proportion of the shares held by each shareholder in the total share capital of the company.

Stock is an integral part of the capital of a joint-stock company, which can be transferred and traded, and it is the main long-term credit tool in the capital market, but the company cannot be required to return its capital contribution.

The stocks of listed companies in China are divided into A shares, B shares, H shares, N shares and S shares. This distinction mainly depends on the place where the stock is listed and the investors it faces.