There are many shops in Shenzhen. I have seen it in Huaqiang North, Dongmen and Nanshan.
They also have many advertisements, which are often seen on buses and subways.
If you want a loan, Zhongan Xinye should be more reliable.
You need to provide them with some information, mainly depending on your credibility and repayment ability.
If the loan is unsuccessful, you have nothing to lose. Anyway, remember,
The kind that charges you money first and then gives you a loan is definitely not reliable.