Greetings that open doors
A warm 'nǐ hǎo' with a nod or light handshake is the standard greeting. Chinese handshakes are softer and shorter than western ones — don't crush. Bow slightly when meeting elders. First names come last; 'Lǐ xiānsheng' (Mr Li) is safer than using someone's given name early.
Business cards are exchanged with two hands and read, not pocketed immediately. Among friends, informality rules — but warmth beats formality everywhere.