The trade "war" between the United States and China is a misnomer for several reasons. One is of course that only real wars, not trade conflicts, kill people. Morally, the abuse of this term in advanced societies merely reflects the fact they haven’t experienced actual war on their turf for decades, if ever. In China, its growing use is essentially a propaganda prop.
The second reason is that direct trade flows between China and the US, as impressive as they seem, are minuscule relative to GDP: 1% of US GDP for American exports to China, 3,6 % of China’s GDP for exports to the United States (it was 7% a decade ago). Assuming the tariff increases diminish but do not wipe out these trade flows, their immediate impact is of course lower. This, however, does not consider the psychological impact on consumers and investors, or the sector-specific targeting that can be harmful to long-term development, especially for China. Within this targeting, the denial of some tech inputs, or the ban on public purchases of critical equipment is beyond our present scope, which is on the tariff issue.
Coincidentally, China launched a massive domestic stimulus program in December 2018 that will last throughout the first half of 2019. This boost to the economy – perhaps USD 320 billion of new infrastructure projects, and USD 300 billion worth of tax cuts (including VAT rebates for sectors that were hit by tariff increases), was accompanied with claims that China was immune from the effects of trade sanctions, before trade talks were held again. Also, deals were made with selected foreign companies, and there was a further opening to foreign investments in some key sectors, such as finance and automobile. BASF, Exxon, Tesla, BMW, and on a smaller scale Allianz, AXA and BNP were allowed to increase their participation up to 100 % in their joint ventures. During this period, the three main measures – managed import reductions, stimulus to the economy, selected concessions to foreign partners – could give the impression of a China that made the United States suffer the consequences of its own trade tariffs, remained on a strong growth path and was also flexible and ready to reform the economic structure. But on its own terms and schedule.