If you are paying by webpay you only need to write down the confirmation of payment number you will given when you complete the payment (a very important number - don't forget to write it down) on the top of the contract letter. Send this to Yang Haibo.的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

如果你是由webpay支付你只需要写下你会给予确认支付数量，当你完成支付合同字母的顶部（一个非常重要的数字 - 不要忘了把它写下来）。发送此杨海波。