No, we cannot make an ozone layer above it, below it, and we can't fill it in. We just have to stop dumping things into the atmosphere.
We'd burn up all our fossil fuels trying to get ozone "up there", which would destroy more ozone than we ever made.
Yes, it can be repaired. It is possible if we curb the use of ODS i.e. ozone depleting substances.
Above: the rest of the stratosphereBelow: the rest of the troposphere
The ozone layer dissolves above Antarctica. It is because of cold temperature there.
Antarctica has the least amount of ozone above it. It is due to the low temperatures there.
The ozone hole is located over the antarctic region of the earth i.e. above Antarctica. It is because of the increase in the rate of depletion of ozone at lower temperature.
See "In what layer of the atmosphere do you find the ozone layer?"
There is no specific hole in the ozone layer directly above China. However, ozone depletion is a global issue, and areas around the world, including China, can be affected by thinning of the ozone layer due to human activities.
Above the Antarctic.
The layer of gas found above Antarctic is ozone. It was found to be depleted.
Pollution depletes the ozone layer, and is causing a hole in it right above Antarctica.
Natural
Ground level ozone is harmful as it can cause respiratory issues, especially for vulnerable populations like children and the elderly. Ozone high above Earth, in the stratosphere, is beneficial as it forms the ozone layer that protects us from harmful UV radiation.