"Bamboo shoes are lighter than horses". Let's talk about bamboo sticks, shoes and horses first. The former is used for walking and belongs to idle people. Two years later, the author left Huangzhou and moved to Ruzhou, passing through Lushan Mountain. There is a poem in "First Entering Lushan Mountain": "You can swim with a bamboo stick in your shoe; It is strange that in the deep mountains, everyone knows the old days. " He used bamboo sticks and straw sandals, which is what he called "I am an idle person in the world" ("Nan Gezi"). And horses. It is the mount of officials or busy people, which is also called "busy horseshoe on the sidewalk". Both of them come from the word "line", so they are comparable. Where is the former better than the latter? The reason, to put it mildly, is that it is chewy. Bamboo sandals are light, light, light, but walking in the rain is far less convenient than riding a horse. Then, the word "light" must have another meaning, which is obviously "no official is light"