Postal code (Zipcode) of Xã Sơn Lộ is: 21365

Son Lo Wards, Bao Lac District, Cao Bang Province, Viet Nam

Vietnam, whose national name is the Socialist Republic of Vietnam, is a socialist country located at the eastern tip of the Indochina peninsula in Southeast Asia, bordering Laos, Cambodia, China, and the sea. East and Gulf of Thailand. The territory of Vietnam has been inhabited since the Paleolithic era, starting with the states of Van Lang and Au Lac. Au Lac was annexed by the Trieu Dynasty in the North in the early 2nd century BC, followed by a period of Northern domination lasting more than a millennium. The independent monarchy was re-established after Ngo Quyen's victory over the Southern Han dynasty. This event paved the way for independent dynasties to succeed and then repeatedly win against wars of invasion from the North as well as gradually expanding to the south. The final period of Northern domination ended after the Lam Son insurgent army's victory over the Ming Dynasty.

With a history of fighting against invaders to protect the land, win freedom, independence and build the country dating back thousands of years by the Vietnamese people and the convergence of 54 other ethnic groups. each other has contributed to the diversity, richness and uniqueness of Vietnam's culture.

According to the ups and downs of the nation's history, Vietnamese customs and practices are constantly being innovated according to social trends. One of the oldest and most influential customs in history is the custom of chewing betel. This is a custom that dates back to the Hung King period and originates from the legend of Trau Areca and this custom has become a typical image of the brotherhood and love between husband and wife of Vietnamese people. Not only the custom of chewing betel, Vietnam also has another custom that was born in ancient times, which is the custom of welcoming the new year, also known as Tet - traditional Tet.

Vietnam's history began from 1 to 2 thousand years BC. Over many centuries with the Ly, Tran, Le, and Nguyen dynasties, from the mid-19th century, Vietnam became a French colony. After the August Revolution, the Democratic Republic of Vietnam was born. The Battle of Dien Bien Phu in 1954 marked the end of the French in the territory, but Vietnam was divided into two countries: the Democratic Republic of Vietnam in the North and the Republic of Vietnam in the South. After the events of April 30, 1975, Vietnam was unified and from July 2, 1976, officially named the Socialist Republic of Vietnam.