Yeah, I don't think China makes much money off exports. Most components like iphones are built in other nations and sent to China just for factory assembly. China only markups a bit for labor charges. On Apple iphones, you have LCD screens and processors from South Korea. Chips from USA. Cameras from Japan. Accelerators from Germany. Gyroscope from Switzerland.
Now USA blames China for massive deficits. I don't think the accounting make any senses. The deficit blame should be squarely placed at wherever the country the components originated from, not China. US allies fully know that. They rather keep silent about it. That is why no ones want to come out and challenge China. So they can get away from it.
I don't think China really care if everyone stop making products there. China doesn't really lose much. They have a huge internal domestical markets to grow.
Also I find it strange that no ones speak about China tourists and students bringing about $38 billion USD and $13 billion USD respectively to US economy last year. It is projected to be more than $120 billions annually by year 2022. It is not a small number considered travel and tourism industry is about 10% of US GDP.