Original sentence: During the dynasty era, Hán tự and Chữ Nôm were formally used in the country.For instance, in Hán tự, Hoàng Sa is written as 黃沙.From the mid 17th century onwards, Quốc ngữ, the modern Latin-based alphabet spelling system was introduced and eventually recognized as the national language in the early 20th century.Historically, the Vietnamese language has taken several different paths.It is believed that a large number of Vietnamese documents relating to the islands was lost during the three major wars, including a thousand years of constant struggles and battles against the Chinese domination and aggression, a hundred years of waves of uprisings to regain independence from France, and more than two decades of bloody fighting among the Vietnamese themselves.Only under the reign of Emperor Minh Mạng (1820-1841) when the Spratlys were distinctly delineated from the other and officially named Vạn Lý Trường Sa, the Ten-thousand-league Long Sandbank.The former, the classical Chinese character, was more popular than the later and the most widely used to produce documents during the kingdom age.They all have exactly the same meaning that is the Golden Sands or the Golden Sandbank for a better visualization of the islands.This war-torn nation has witnessed many significant changes through out of its history, including the country name, but the name of the islands, Hoàng Sa, remains completely unchanged in more than five hundred years
Edited sentence: It is believed that much of the Vietnamese documentation relating to the islands was lost during the three major wars, including a thousand years of constant struggles and battles against the Chinese domination and aggression, a hundred years of waves of uprisings to regain independence from France, and more than two decades of bloody fighting among the Vietnamese themselves.Only under the reign of Emperor Minh Mạng (1820-1841) when the Spratlys were distinctly delineated and officially named Vạn Lý Trường Sa, the Ten-thousand-league Long Sandbank.They all have the same meaning that is the Golden Sands or the Golden Sandbank.This war-torn nation has witnessed many significant changes during its history, including the country name, but the name of the islands, Hoàng Sa, has not changed in more than five hundred years