multitude; a vast crowd; a phrase describing a place packed with people, literally like mountains and oceans of people

Pseudonym of [[朱耷|朱耷|zhu1 da1]] (1626–1705), a famous painter and calligrapher of the late Ming and early Qing dynasties; one of the Four Monk Masters, he is known for his individualistic and minimalist style in landscape and bird-and-flower paintings.

I have a trick up my sleeve; indicates that one already has a clever strategy or solution in mind.

pen name of the late Qing dynasty novelist Wu Woyao, best known for his work Twenty Years of Witnessing Strange Phenomena