It is usually more difficult to obtain undisclosed financing details because this information was a company's trade secret before it was disclosed. There are several possible ways, but they all have certain limitations.： 1. Through interpersonal networks: if you know the employees, investors, or consultants of the company, they may have this information, but they are usually subject to confidentiality agreements. 2. Internal industry news: Sometimes there will be some rumors in the investment circle, but the accuracy is difficult to guarantee. 3. Commercial databases: advanced versions such as CB Insights, Crunchbase Pro, etc. may provide some undisclosed information 4. Regulatory documents: In some cases, companies need to submit documents to regulatory agencies, which may contain financing information It should be noted that if this information is obtained or disseminated without the company's consent, legal and ethical issues may be involved. The best practice is to wait for the company's official announcement of relevant information, or contact the company through formal channels to inquire.