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However，the Chinese officials have already realized that China still has adequate reason to persist on buying American national debt.If the authorities expect to reserve most of the tremendous amount of storage in the form of floating assets，then there would be no better choice that has greater depth than keeping American national debt.Moreover,if not looking forward to so much accumulated storage,China has to make RMB increase in value before the decrease of export,which is apparently not expected by the Chinese government.

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你好，翻译如下
Yet officials recognise that there are still powerful reasons for Chinato keep buying Treasury bonds. If the authorities want to maintain most of their vast holdings in liquid assets, there are few options that match the depth of theUSgovernment bond market. And ifChinadid not want to accumulate so many reserves, it would have to let its currency strengthen – exactly what the government does not want at a time when exports are crumbling.

However, Chinese officials realize that China still have sufficient reasons to go on purchasing American national debt. If the authorities hope that they can hold the most parts of the large amount of reserve in the form of current assets, then there is hardly any choice which can equal the deepness of the American national debt market. Moreover, if China doesn't want to accumulate so much reserve, then the domestic currency must appreciate. But as the export is slumping, it's the last thing which Chinese government wants to see.

However, Chinese officials are aware of, China still has plenty of reasons to buy American debt. If the authorities want to liquid assets, most of their vast holdings, there are few options can be comparable to the United States Treasury market depth. And if China did not want to accumulate so many reserves, it would have to let their currencies appreciate -- in the export slump, this is precisely the Chinese government doesn't like