The People’s Republic of China says it has ordered businesses doing business with northern Korean entities or individuals must shut down within 120 days.

This would be cool, if it happens.  The PRC has said it would enforce other sanctions, also, and then only paid lip service to enforcement while engaging in business largely as usual with the north.

Believe it when you see it actually happen.  If it does happen, believe the durability of PRC enforcement when it actually lasts.