Hometown university recruitment

LZ, don't worry, it's normal. There are two recruitment modes for large companies:

First, open recruitment is available in every enterprise.

Second, internal staff recommendation, a common employment mode in European and American enterprises, has now spread to China. Because internal staff are familiar with the needs of enterprises and are responsible for the candidates recommended by themselves, the candidates recommended by internal staff may be more suitable for the needs of the company.

Your situation is recommended by insiders, and the positions recommended by insiders are not necessarily open for recruitment, so it is not surprising that you didn't see your positions online.