Football/Soccer field in Tainan/Annan

I am looking for a field to play football with my team. I have asked several schools if they would be willing to share/rent their field to us but they all refused.
Would you have some hints for find a field, preferably with spots for playing in the evening in Annan area or Tainan city.

That would be fine to share a field with another team as well.

Nobody has any tips?

How about that place just behind the Train station, you already asked I guess?

Yes I have asked this university but they said it is only for their students

I have seen soccer practice for kids at Litiyu Park (台南市立體育公園), which is behind the baseball stadium. It is nicely maintained, and I can’t imagine that the soccer clubs are not private ventures. So there must be a mechanism to rent the space.