1. Pig-arched cabbage means that Chinese cabbage is an edible vegetable. The owner will grow Chinese cabbage in the garden to eat, and the nature of pigs is digging. When the pig runs into the garden, the cabbage will arch up.
2. Now extends to? Pigs? Refers to men. Cabbage? Girls. Good cabbage is arched by pigs, which means that good girls are occupied by bad men.