The blind man carried the second half of the lantern.

1. It's a joke that a blind man carries a lamp, which means that a person does things without thinking and only does unnecessary things.

2. It comes from the story of alms given by monks in the Southern and Northern Dynasties. Because they are blind, they can't see even with lanterns. So, literally, they are redundant to others, which is ironic. They satirize that blind people can't see and do useless work. At the same time, they also have a redundant selfless spirit to themselves, but they have to carry lanterns to illuminate the road where people can see.