First of all, it must be understood that the quality of imported food is one of the factors that affect people’s decision. This is because food which is exported to another country always nutritious and they were cultivated in modern environment. Furthermore, imported food such as vegetables or fruits are usually exotic to the local region. Therefore, they will appeal local people to buy and ignore local products, leading to the reduction of local food’s sale. For example, nowadays, many people in Vietnam prefer buying strange food from other countries due to their good effects on health.