The deposit is pledged for fear that Party B (the lessee) will violate the contract regulations and end the lease term ahead of schedule. If the contract does not expire, the lessor has the right not to refund your deposit. Why did you put so much money on the deposit? Go and discuss it with Party A and see if you can refund it. It's basically impossible to fully refund it. Remember that no matter whether you rent a house or shop, don't deposit too much. Generally, a deposit of 2 months rent is almost the same.