Chusan, Or Chowsan (Boat-Like), a group of islands, consisting of one large island with a great number of smaller ones, off the coast of China, about lat. 30° N., lon. 122° E. They are beautifully wooded, abound in floral productions, and contain numerous excellent harbors. The largest island, called also Chusan, is about 50 m. in circumference; pop. about 250,000. The land is carefully cultivated, and rice, wheat, sweet potatoes, chestnuts, walnuts, tobacco, tea, silk, and cotton are produced. The climate is temperate and healthful except in the summer months. Chusan is an intermediate port between Japan and the Chinese ports of Ningpo, Hangchow, and Shanghai. In 1840 the British seized the islands, and held them for a time. As stipulated in the peace in 1842, they were evacuated in 1846, and Hong Kong was ceded to the British in their stead. They were occupied by the British again in 1860, but evacuated the same year. The capital is Tinghai, a walled town about 2 m. in circumference, containing some fine specimens of Buddhist temple architecture.