You can tell them the information you received when you report the case, because it takes some time to investigate, but it is obviously kidnapping. In order to reduce the harm, you should investigate immediately, which is not something you can find yourself. Do you know how big Xinjiang is? Aksu is surrounded by desert. If the clues you provide are true and effective, it is not difficult for the police to find out, because there are special police officers everywhere in Xinjiang, and the police force is sufficient.
You should report the case directly to the local public security bureau and ask them to contact the Xinjiang police to assist in the investigation and find someone. That is what we pay taxes to support them. Their criminal investigation is to find someone to find clues, not to let the victims say it themselves. This is a criminal case, not an economic dispute.
If they don't care about prevarication, they will go directly to the local supervision office for supervision. If they can't, they will be supervised by a higher level.