《太平广记·卷一百四十·征应六（》
每年到了入冬的时候，就把它连土挖出来，埋藏在地窟里，等到春暖花开时再把它栽上。
每至入冬，即连土掘取之，埋藏于地窟。候春暖，即再植之。
In the winter, they would dig out the trees with the dirt and store them in the cellar, only to replant them in the spring.