What's technical term for allowing a foreign TV channel to..

Please give more information about what is to be done. Do you mean an English language TV channel would be made available or transmitted to viewers in a certain area? If so, maybe use those phrases. "Touch ground" means something else altogether, (if it means anythingh at all!)

broadcast
or
to air

to allow a Chinese TV channel to broadcast locally.

to allow a Chinese TV channel to air their programming locally.

Joe( Nation

to be received

Probably it's a Chinese jargon in TV circles
Maybe touch ground (luo di) is a jargon used by Chinese TV people.
Maybe some of your TV people use their own jargon to express this idea.