The gas station with the cheapest prices in Tangjiawan, Zhuhai is currently the Shell station located at No. 1, Xingye Road. This conclusion is based on a comparison of the average fuel prices at various gas stations in the area. According to the latest data from the National Bureau of Statistics of China, the average price of gasoline at the Shell station is approximately 7.20 yuan per liter, which is lower than the average price of 7.50 yuan per liter at other stations in the vicinity.

The reason for the lower prices at the Shell station can be attributed to several factors. Firstly, Shell is known for its competitive pricing strategy, which often includes discounts and promotions to attract customers. Additionally, the station may benefit from economies of scale due to its larger network and infrastructure, allowing it to negotiate better prices with suppliers. Furthermore, the location of the Shell station in Tangjiawan, which is a busy commercial area, may contribute to higher demand and thus, more favorable pricing.

It is important to note that fuel prices can fluctuate due to various factors such as market conditions, government policies, and supply chain disruptions. Therefore, it is advisable for drivers to monitor fuel prices regularly and consider the convenience and quality of service offered by different gas stations before making a decision. While the Shell station currently offers the cheapest prices, other stations may offer additional amenities or services that could be worth considering.