Vietnam has several methods of preserving heritage. One of the most common methods is through government funding. The government money in preserving heritage sites and objects, and it has been successful in many cases. Another way is through public-private partnerships, where companies provide funding for heritage preservation in for advertising or other benefits.
Vietnam has also used UNESCO funding for the preservation of its cultural heritage. Additionally, the country has strict heritage laws to protect its heritage sites and objects. For example, in 2016, Vietnam passed a law on cultural heritage, which regulates the , preservation, and promotion of the country's heritage.
As for which method works best in Vietnam, it depends on the specific context and situation. Each method has its and disadvantages, and a combination of different methods may be the most effective way to preserve heritage in Vietnam.