night-closed night is the time the city fell asleep, the quiet streets, the yellow street lights caught through each window slot, the Dong Xuan market-the largest wholesale market in Hanoi still has the people who work silently to keep the business of more than 2000 business households and the assets of the small businesses One of those people has a typical example of Mr. Nguyen Van Duoc with more than 17 years working as a night shift - Dong Xuan Joint Stock Company.