（华盛顿／北京6日综合电）中美贸易战再起波澜，美国总统特朗普星期日在推特宣布，周五（5月10日）起将2000亿美元中国商品关税税率调高至25%。

特朗普指出，与中国的贸易协商仍在进行，但由于中国试图重新谈判，导致进度缓慢，并不可行。他又说，仍有3250亿美元中国商品未被征收关税，称这些商品不久后也将被征收25%关税。

《华尔街日报》引述知情人士透露，北京方面考虑退出定于本周开始举行的贸易磋商。这一意外转折令人怀疑中美双方能否达成贸易协议。

而中国官方《环球时报》总编辑胡锡进在推特英文帐户发文，估计副总理刘鹤本周几乎不可能赴美。

胡锡进称，特朗普威胁中国，但他似乎不理解关税是如何运作。不确定美国民众是否理解。他指出，中国一直都在为最坏的情况做准备，不会相信这种把戏。“此外，他甚至都吓不到朝鲜”。

For 10 months, China has been paying Tariffs to the USA of 25% on 50 Billion Dollars of High Tech, and 10% on 200 Billion Dollars of other goods. These payments are partially responsible for our great economic results. The 10% will go up to 25% on Friday. 325 Billions Dollars….

— Donald J. Trump (@realDonaldTrump) May 5, 2019

….of additional goods sent to us by China remain untaxed, but will be shortly, at a rate of 25%. The Tariffs paid to the USA have had little impact on product cost, mostly borne by China. The Trade Deal with China continues, but too slowly, as they attempt to renegotiate. No!

— Donald J. Trump (@realDonaldTrump) May 5, 2019