This is in direct retaliation of US ban on chip technology export. In fact, you can even find their rationale for doing so on this pro-China reddit thread from

This is in direct retaliation of US ban on chip technology export. In fact, you can even find their rationale for doing so on this pro-China reddit thread from six months ago: https://www.reddit.com/r/Sino/comments/y9c1n4/china_should_retaliate_indirectly_by_choking_off/ https://www.reddit.com/r/Sino/comments/y9c1n4/china_should_r...