1. The way to sue the gym is as follows:

(1) The parties may or shall submit a complaint to the people's court;

(2) The parties may also complain to the local department that accepts product quality problems;

(3) Prepare a copy of the ID card of the prosecution and the ID card of the other party.

2. Legal basis: Article 122 of the Civil Procedure Law of People's Republic of China (PRC).

Prosecution must meet the following conditions:

(1) The plaintiff is a citizen, legal person and other organization that has a direct interest in the case;

(2) Having a clear defendant;

(3) Having specific requests, facts and reasons;

(4) It falls within the scope of civil litigation accepted by the people's court and is under the jurisdiction of the sued people's court.

Article 123

The prosecution shall submit a complaint to the people's court, and submit copies according to the number of defendants.

If it is really difficult to write a complaint, it can be made orally, which will be recorded by the people's court and the other party will be informed.

Second, what materials are needed for prosecution?

The materials required for prosecution are as follows:

1, pre-litigation property preservation application and pre-litigation property preservation guarantee;

2. Materials to prove the subject qualification of the parties;

3. If the application is entrusted, the power of attorney of the applicant shall be submitted;

4. Materials that prove the existence of civil legal relationship between the applicant and the respondent, such as a copy of the contract, documents certifying creditor's rights and debts, marriage certificate, etc. ;

5. The specific property clues and ownership certificates that the respondent intends to seal up, the list of secured property and ownership certificates equivalent to the amount of the subject matter applied for sealing up, etc.