Postal code (Zipcode) of Huyện Kiên Hải is: 92400

Costume is one of the important factors that differentiate Vietnamese culture from other countries in the world. The costumes not only mark the cultural traditions and customs of the Vietnamese people, but they are also the breath and soul of a nation.

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.

Vietnamese culture is one of the oldest cultures in the Pacific region. Although located next to two major cultures, Chinese and Indian culture, Vietnam still preserves many of its own cultural features, expressed in many aspects such as traditional customs that still exist today. Nowadays, Vietnamese people's life and folk literature are rich and unique. It can be said that Vietnamese culture is a special blend of many ancient cultures along with the indigenous culture of the Vietnamese people. In addition to the greatest influence of China, there is also the influence of Indian and Cham culture. , and later the great influence of Western culture (France, Russia, America).

Hang Market (Hai Phong) was formerly the market of an ancient village called Du Hang (17th-18th centuries). The Du Hang village area was formerly agricultural land and a traffic hub, so Hang market became a place to meet, exchange, and buy and sell plants, animals, and farming utensils. The urbanization process spread to the suburbs, so today Hang Market is located entirely in the inner city, in Du Hang Kenh ward, Le Chan district, Hai Phong city. Even though many years have passed, the customs of exchanging agricultural goods of c