Can you help me find info on these brands?

I've been purchasing loose leaf tea from my local Asian supermarket and I've been searching for info on some brands I found:

Tea King of China, THS Blue Lake Group, and A Better Choice.

I've picked up some Shou Mei White Tea from Tea King and it's pretty gnarly, but distinct enough to be good.

I'm a bit wary of THS and A Better Choice. THS puts their tea in these apothecary-type bottles and ABC just puts it in these brown bags.