Doing business in China requires understanding important cultural norms around greetings, business cards, gifts, meetings, and attire. Handshakes should be firm but not overly vigorous, with a slight head nod. Business cards should be exchanged with both hands, Chinese characters facing the recipient. Gifts are positive but should be modest and reciprocated by refusing three times. Meetings require punctuality as lateness can cause insult, and discussions should avoid politics. Attire for both men and women should be conservative and modest.