Why do couples have to have a labor contract to apply for a health certificate when they open a store in partnership?

According to the relevant information, this is because your husband and wife are self-employed and there is no unit introduction and guarantee. Opening a shop requires a health certificate, and self-employed individuals need a house lease contract, a labor service contract, a business license, etc. A health certificate is a health examination certificate, which proves that you have started a health examination.