1. Dong Xuan Market is located in the Old Quarter of Hanoi, Vietnam and is considered one of the biggest and most popular markets in the city. It was built by the French colonial government in 1889, and since then it has become a popular attraction for locals and tourists alike. The market features a wide variety of products, including clothing, electronics, souvenirs, fresh produce, and traditional Vietnamese food.

2. The market is open every day from early morning until late in the evening. However, some vendors may close earlier depending on the day of the week. There is no phone number available for Dong Xuan Market.

3. There is no entrance fee to enter Dong Xuan Market. The market is easily accessible by public transportation, including buses and taxis. Tourists can also take a cyclo (traditional bicycle taxi) or walk to the market from nearby attractions in the Old Quarter.