The spring silkworms will not run out of silk until they die, and the wax torch will turn to ashes before the tears dry up.

It is better to keep the silkworms alive than to keep the leaves dry.

Cannibalize and swallow up whales: occupy step by step like silkworms eating mulberry leaves, and devour all at once like whales swallowing. It is a metaphor for occupying and annexing the territory of other countries in various ways.

Silkworm head and swallow tail: describes calligraphy that starts with a solemn stroke and ends with a light stroke.

Cancong Niao said: It refers to the dangerous mountain road.

Silkworm crab Kuang: Kuang: back shell. The metaphor is right and wrong, and the two have nothing to do with each other.