Why are China and Vietnam known as "comrades and brothers"? 

CGTN reporter Shen Shiwei found part of the answer at the Ho Chi Minh Exhibition Hall in Longzhou, a Chinese town bordering Vietnam in Guangxi Zhuang Autonomous Region. 

The hall originally served as a secret location for the Communist Party of Vietnam in Longzhou. Beginning in 1926, Ho Chi Minh and fellow Vietnamese revolutionaries undertook a revolutionary campaign in Longzhou that lasted for 18 years.

Today, the Ho Chi Minh Exhibition Hall continues to closely embody the deep traditional friendship between China and Vietnam, having become a rare and valuable educational base for the youth of both sides.