What is the secret of the Monkey King's best friend Dragon Ball?

From the top of Karin-sama in Kerita, there is a hole where you can put the best stick. Put the best stick in the hole and let it stretch until it reaches the bottom of the temple. There is also a hole, that is to say, the best stick is the way for ordinary people to reach the temple of the gods. Sun Wufan, the grandfather of Wukong, accidentally got the wishful stick and gave it to Wukong.