Wu Sangui was a general of the Ming Dynasty.  While he was supposed to be defending China against the invasion of the Manchus, he betrayed his country.  He opened a gate of the Great Wall of China for Manchu soldiers.  The Manchus marched into Beijing and this marked the beginning of the end of Ming China.  

His contribution to the establishment of Manchu China (Qing) earned him important power: he bacame the Pingxi King, king of Yunnan.  Instead of staying loyal to the new Emperor of China (Kangxi), he revolted and attempted to take over all of China.  His revolt was not successful.  He was probably the most ambitious and opportunistic ruler the China has seen.

The Golden temple isn't actually made of gold, but silver.  Over the last 300 years, it has completely oxidized.

Weapon owned by Wu Sangui.  Rumour has it that it had been used to kill soldiers of three dynasties, Ming, Qing, and Shun (大順皇帝) (Li Zicheng) (李自成).  Shun never became a real dynasty.  Li was one of the many rebels in late Ming Dynasty the was eventually suppresed by the Manchus.

Wu Sangui

Statue of the God of the North, note his face.

Tea originated from China.  It was discovered over 3000 years ago.
Pronounced "cha" in Mandarin and Cantonese, but "Te" in Minnan and Chaozhou languages, the word eventually made their way into every language in the world.  Yunnan was probably one of the earliest tea-producing regions, as its climates most fitted tea plantation.  The ancient Tea Route also began in Kunming and snaked through the mountains of Yunnan into Thailand and Myanmar (Burma).

Tea columns and discs were carried on horsebacks along the Tea Route.