it would seem that way, lol, but no...they are a tiny fraction of the #1 import.
Top US imports from China:
1 Electrical machinery and equipment
2 Power generation equipment
3 Toys, games, and sports equipment
4 Furniture
5 Footwear and parts thereof
6 Apparel, knitted or crocheted
7 Apparel, not knitted or crocheted
8 Plastics and articles thereof
9 Iron, steel
10 Vehicles, excluding rail
all above are in the *billions* of dollars -- for instance, electrical machinery and equipment is over 98 billion per year.
https://www.uschina.org/statistics/tradetable.html (2011 stats, but figures have only increased since then)
Ref beat me to it, darn
...but i'm leaving it since i put in the effort.