Game bai doi thuong, often referred to as "baciu" or "doi thuong," is a form of lottery that has gained significant popularity in Vietnam. These games are not only entertainment but also play a role in the daily lives of many people. They operate legally under government supervision, providing an alternative source of income for citizens while also contributing to the economy. The most popular game bai doi thuong includes Xuan Phong, which features a rotating wheel, and Tiger slot machines, inspired by traditional slots. These games are accessible in most cities and provinces across Vietnam. Players can participate online or offline through various channels, making them versatile for different audiences. Lottery games have become a cultural phenomenon, with many people using their winnings to improve their living conditions. However, they also carry risks, as the odds of winning are often low. Despite this, the appeal of these games remains strong among Vietnamese citizens, reflecting their diverse entertainment preferences and economic needs.