When qian long expected lord George Macartney to kowtow what do you think Macartney should have done?

Lord Macartney compromised with the Chinese by offering the same respect as he gave his own King, George III, the Chinese accepted that offer, and historians should accept that compromise in the spirit in which it was offered and accepted. This question by its phrasing implies that Lord Macartney should have forgotten who he represented, that is, King George III, and treated Emperor Qian-long according to China's limited idea (at the time) of its position in the world. King George III had a different idea of the potential relationship between Great Britain and China from that of Emperor Qian-long.