紧急翻译一段非常短的文字（汗译英），谢谢。(200分)

各位大虾，俗话说：在家靠父母，在外靠朋友，在网络时代就要靠网络了。
本人今天下午5点之前要给外国出版社发一封信，内容如下，需要翻译成英文，
请大虾帮助翻译一下，拜托了。
要翻译的文字：
经过我们多方面的协商，国内出版社最后同意预付款为500美金每本，希望你们可以接受。
中国最大的出版社人民文学出版社，在图书引进方面很有经验，他们刚刚引进的《哈利波特》《Hexe
Lilli》在国内反响很大。但是这些书的预付款也是版税的50%左右，其余的款项半年结算一次。这是中国出版业的现状。因为预付款是不能退，版权引进方是有风险的。
出版社不能付全款的另一个原因是：如果我们提出要全款，国内的出版社会认为是版权的买断，出版社再次印刷时，他们就无须付款了。
13亿人口的中国，有着巨大的市场潜力，希望这是你们顺利进入中国市场的契机，预祝我们合作愉快！

After arranging allaround,our national press finally agreed that the advance payment should be 500do
llars per book.I wish you to accept it. People`s Literature Press,which is the biggest press in China,has a lot of experience in introducing books into China.《Hexe
Lilli》,which they have just introduced,is very popular in our country.These books` advance payment
is only 50% of tax on books,other payment is settled once a year.This is the status quo of China publishing industry.Bacause the advance payment
can not be withdrawed and the press are taking a risk.The other reason is that if we reqiure that all the payment must be paid off at once,our country`s presses will consider it as a monopoly of copyright and they will pay nothing when they publish the book again.
China has a population of 1.3 billion.
It has big market potential.I wish that it be your chance of entering China market.I wish we have a good
cooperation!

既然紧急，那么应该结束了吧？
或者结束，或者提出意见

CJ 又一个月了！

多人接受答案了。