There are lots of posts about watching Chinese broadcast TV channels from outside of China, but almost all of them are some combination of (1) terribly painful (2) sketchy / illegal pirate streams (3) expensive.
I’ve found one good alternative app which is a breeze to use, and charges $3 USD a month:
It delivers all the CCTV channels, including CCTV15 (music), as well as a bunch of regional broadcast channels.
I’m unclear how “official” and licensed this app is, but there are media reports that it is a legitimate company, and they claim that they are “the only high-definition Chinese TV software officially authorized by the China State Administration of Radio, Film and Television.”