《太平广记·卷八十三·异人三》
君胄正彷徨于街头，不知道该往哪里走，在向周围张望时看见原先见过的那两个小童已经站在自己身边，小童对君胄说： 这个国家与你的国家相比，到底哪个大哪个小？既然到了这里，何不跟我们去拜见蒙玄真伯。 
君胄彷徨，未知所之，顾见向之二童，已在其侧，谓君胄曰： 此国大小于君国，既至此，盍从吾谒蒙玄真伯。
Junzhou was wandering about the streets, not knowing where to go. When he looked around, he saw the two young children he had seen before standing beside him. The young child said to Junzhou: Which country is bigger and smaller than your country? Now that I'm here, why don't you come with us to visit Mengxuan Zhenbo?