There are several types of chinese cabbage.
Chinese cabbage is more closely related to the mustards than to the cabbages.
Chinese cabbage prefers cool weather and likes a fertile, well drained, moist soil. Some root problems can be avoided on light soil. Chinese cabbage can be direct seeded into the garden to avoid transplanting shock. Bok Choi is spaced 8 to 10 inches apart in rows 12 to 15 inches apart. Thin to 8 to 10 inches 2 to 3 weeks after the plants emerge.