Of course not. If you don't pay back the money, the state has the right to investigate your repayment ability, and will bring a lawsuit to the court, and then force the repayment through the enforcement agency.

However, when the quantity is large, this is usually mandatory.

If the amount is small, you will be blacklisted. If you want to borrow it again in the future, it will be difficult to borrow it, or no financial institution will lend it to you, or it will be difficult to lend it to you.

Interest-free loans, just to reduce the economic burden of entrepreneurs, the state gives some support to have such a good policy.