Why didn't China football seek foreign aid?

It's not that I don't want to find it, let alone Qatar. Even in Japan, there are foreign monks like Lopez and Sanduzhu, and it is really fast to improve the level of the team. It's not that there are no foreigners who want to join the China team. Marcos, a former Brazilian foreign aid from Shaanxi, publicly expressed his desire to become a citizen of China, but our national conditions do not allow it. Our "fundamental" concept is too strong for China people to accept that a foreign player wears a team uniform with the national flag of China.