however, China wasn't lagging behind at etching tools like lithography tools. it's actually one of the leading players in that field.
for example, in 2018, China's AMEC already made 5nm etching tools and been verified by TSMC, many chips on the market today were made possible by their tools:
Advanced Micro-Fabrication Equipment (AMEC) announced recently its in-house developed 5nm plasma etching tools have been verified by Taiwan Semiconductor Manufacturing Company (TSMC).
www.digitimes.com
and Tom's hardware literally reported on it, just 2 months ago:
AMEC reaps China's domestic market amid US sanctions.
www.tomshardware.com