About Bank Statement issue

1. I had been living in China (Beijing) for 6 years. Now, I miss it and want to visit it again. So:

2. For applying for Tourist L: recently, I don't have a job so In my bank account, how much the lowest/minimum amount of money must be in my bank account? I heard from my friends there's minimum amount of money must be in my account in order to apply for tourist L? Is $3,000 enough for applying?

3. Kindly, I just need a confirmation for this point: for an unemployed person: is it enough statement from the bank?

Thanks