求翻译：本合同实行抵押承包的原则，在签订合同时，乙方必须在30天内按鱼塘每年承包款总额30%作为承包押金给甲方，即押金金额为人民币67560元，作为履约的保证。是什么意思？

The contract to implement the principle of the mortgage contract, the signing of the contract, the total amount of B must be within 30 days by fish ponds annually contracted 30% as a contract deposit to Party, that is, the amount of 67,560 yuan deposit, as a performance guarantee.

This contract of the principles of security contractors, at the time the contract was signed, Party B must be within 30 days in each year by fish ponds contractors, 30% of the total as a deposit to a contractor, the deposit amount to RMB 67,560 Yuan, as performing.

This contract implements the mortgage contract the principle, when sign contract, the second party must contract the funds total amount in 30 days according to the fish pond 30% to give the party of the first part every year as the contract deposit, namely the deposit amount for the Renminbi 67560 Y

This principle of mortgage contract contract, the signing of the contract, party b must, within 30 days by fish ponds 30% for the contract deposit to the customer the total annual contract, namely deposit amount to RMB 67,560, as a guarantee of performance.

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