From the middle of the 19th century, China became a semicolonial and semifeudal country, and Tibet, just like most other parts of the country, was invaded by the Western powers.

• 十九世纪中叶以后，中国沦为半殖民地半封建社会，西藏与全国其他地方一样，遭受了西方列强的侵略。