Snuff Bottle Connection (1977) on Netflix

Plot summary

China and Russia are talking peace, but agents on both sides want war. Late in the Qing dynasty, Russian officials are dealing with Manchu officials who are ready to hand over a map marking the strategic points Russian troops could use to enter Chinese territory. An earlier government spy was killed, so the government sends another agent to investigate and to keep an eye on a visiting Russian general and his men. The general is a pistol expert, so the agent brings his brother Ko, who is a dagger expert, and a young helper. The traitors use a rare snuff bottle to recognize one another. The agent's task is to uncover the Russian traitor and the contact this man has inside the Forbidden City.