Who is Nan Yiweng's apprentice?

The Antarctic fairy has an apprentice.

Antarctic immortal is a well-known longevity star, and is the god in charge of longevity among the three stars of Fu Lushou. His apprentice is a white crane boy. As a teenager around the Buddha in the early Yuan Dynasty, the crane boy was deeply loved by the Buddha. He has a high position in explaining teaching. Even Yang Jian, the leader of the three generations of disciples, called Hetong a brother when explaining the teaching.