Pay attention to confidentiality; sign necessary contracts or agreements;
As for whether business secrets are leaked or not, patents cannot protect them, because you have disclosed your technology when you applied for a patent. There is no such thing as a trade secret. If there is one, it cannot be pursued using a patent, so one can only rely on contracts to safeguard one's own interests.
Article 59 of my country’s Patent Law stipulates: “The scope of patent protection shall be based on the content of its claims, and the description and drawings may be used to explain the claims.” However, if the patent claims are strictly followed Determining the scope of protection based on the recorded technical characteristics often leads to unfair results. That is to say, it is very difficult for a patentee to predict all possible forms of infringement and record them in the patent claims when applying for a patent. In some cases, it's even impossible. For example, replacement between natural rubber and artificial rubber seems to be very easy now, but in the era when only natural rubber was available, it was impossible to record artificial rubber in the claims.