Apply for patent for culture medium additive

1. No test is needed, as long as the technical scheme does have substantial characteristics and significant progress;

2. The culture medium is applied together with the additive. If the additive itself is newly prepared, it is necessary to protect the additive as the main part of the technical scheme, that is, write the components of the additive, the preparation of the additive and the use method of the additive into the application document.