Missile shield, not tariffs, is what worries China
Usually tight-lipped China has just done something it rarely does. It publicly announced the deployment of new intercontinental nuclear-tipped missiles to Manchuria close to the Russian border.
At least one commentator understood this is a Chinese "taunt" to "spook Trump into going soft on the import tariff and dissuade further Currency Manipulator rhetoric".
Actually that has nothing to do with it. The public nature of the deployment is a response to US deploying the THAAD missile shield to South Korea, which has angered both Russia and China and brought them closer together.
Russia for its part has as much as said it supports the Chinese response.