Today we live in a globalized world where no country produce and consume 100% domestically. Even a closed economy like North Korea has to depend on trade.
The tariffs may not affect most Chinese, but the depreciation of the Yuan will definitely affect most Chinese. Energy, food, animal feed, raw materials, intermediate goods etc. Exports will also be affected because China is a part of the global supply chain; you
import, add-value, and export. The cost of production may rise because of the increase in the cost of imports. There are intangibles too such as investor's confidence and capital outflow if the RMB is fluctuates too much.
Eh...
https://ustr.gov/countries-regions/china-mongolia-taiwan/peoples-republic-china
Exports
- China was the United States' 3rd largest goods export market in 2017.
- U.S. goods exports to China in 2017 were $129.9 billion, up 12.4% ($14.3 billion) from 2016 and up 106.4% from 2007. U.S. exports to China are up 577% from 2001 (pre-WTO accession). U.S. exports to China account for 8.4% of overall U.S. exports in 2017.
- The top export categories (2-digit HS) in 2017 were: aircraft ($16 billion), machinery ($13 billion), miscellaneous grain, seeds, fruit (soybeans) ($13 billion), vehicles ($13 billion), and electrical machinery ($12 billion).
- U.S. total exports of agricultural products to China totaled $20 billion in 2017, our 2nd largest agricultural export market. Leading domestic export categories include: soybeans ($12 billion), cotton ($978 million), hides & skins ($945 million), coarse grains (ex. corn) ($839 million), and pork & pork products ($662 million).