TianqiWade-Giles romanization T’ien-chiPinyin Tianji (reign name, or nien-hao), ch’i, personal name (hsing-ming) Chu Yu-chiaoxingming) Zhu Youjiao, posthumous name (shihshi) Che-tiZhedi, temple name (miao-haomiaohao) (mingMing) Hsi-tsung Xizong  ( born 1605 , China—died 1627 , China )  15th reign name (niaohao) of the 16th and penultimate emperor (reigned 1620–27) of the Ming dynasty, under whose rule the infamous eunuch Wei Chung-hsien Zhongxian (1568–1627) dominated the government while the dynasty disintegrated.

Ascending the throne at the age of 15, T’ien-chi the Tianqi emperor preferred carpentry to governmental affairs. He handed the powers of government to Wei, a former butler in the empress dowager’s service and a friend of the young emperor’s nurse. Wei became the most powerful eunuch in Chinese history, replacing hundreds of officials and creating a network of spies. He even had temples erected in his honour throughout the country.

During this time several foreign invasions took place. The Dutch attacked and occupied the island of Taiwan, a Chinese protectorate; and the Manchu tribes of Central Asia, who 20 years later were to conquer all of China, were virtually unopposed in their conquest of the northeastern part of the Ming empire around the Liao River valley.

Conditions deteriorated in every part of the empire. In the south northern and southwestern provinces, rebellions became endemic, and the imperial treasury was too depleted to repair the dikes when the Huang Ho He (“Yellow River”Yellow River) burst its banks. By the end of T’ien-chi’s the Tianqi emperor’s reign the dynasty had lost control of the country, and his successors were brother and successor, the Chongzhen emperor, was powerless to reverse the decline.