What is the moral of Cuilan?

If Cui Lan is her name, she is Pig Bajie's wife. If it is a flower, it means that a friendship between gentlemen is as light as water; If it is tea, it has the effects of promoting fluid production, quenching thirst, refreshing and improving eyesight, clearing away heat and diuresis, resolving food stagnation and detoxifying; If it is jade, plum, orchid, bamboo and chrysanthemum are called four gentlemen. This is a traditional moral model.