求助-被德国人challenge了

我在领英发了一条动态，大意是我们自己生产原材料纤维，也进行编制等深加工，所以比其他纯粹买原料的绳子生产工厂更能很好的控制质量，保证交期。

然后我收到了这个德国人的挑战。

各位大神们帮我看看我该怎么回复才能既有说服力又不显得弱势呢……

With all due respect , xxx - Every serious fibre rope manufacturer in the world will follow defined incoming material testing processes, test the twines and the rope and is hence in an excellent position to guarantee superior rope strength and all other technical properties.

Also the transit times for the finished product from China to various places in the world needs to be considered. I hence question the statements in this LinkedIn post. Challenge us on quality and lead time. Anytime!