That is a very good question.
In the case of China, there was a request from that country dating back 20 years. The relationship continued over time. Obviously, in order for the relationship to continue, there must be a request on one side, but, on the other, there must also be government support, and there must be an agency that is prepared to respond.
In the case of Mongolia, it was the same situation. There was a request from Mongolia, followed by an agreement signed by the two organizations, with the support of the two prime ministers.