The Boys and the Old Man-2

13 The Boys and the Old Man-2 -based on Korean folk tale Now, the old man put down his bag. “ I am very tired, " he said. “ Who will help me carry my bag?” The big boy did not say anything. The small boy took up the bag. “ You are tired. I will carry it for you, " he said. The old man smiled. “ Take the bag. It is yours, and everything inside is yours too. ” The small boy opened the bag to find it filled with thousands of jewels. When he turned to thank the old man, he was gone!

Where has he gone?