英语翻译合同签订后一周内支付合同总金额的30%作为预付款,货到后两周内付清余款；卖方出具合同总额10%为期一年的银行质量

after signing the agreement pay 30% of the sum as the prepayment in a week,when the cargo arrive,the balance should pay off in two weeks,the vendor should provide one year quality insurance which reach to 10% of the sum and insured by the bank.