1 because the distance between Shanghai and Wuxi is close, the economy is developed, the traffic is relatively convenient, and the road transportation is economical and fast! The distance from the west to Shanghai is far, and the cost of long-distance railway is lower than that of highway transportation.

2 yes. Because building a factory in this province is the most profitable.

3 whether the transportation is convenient, the regional demand, transportation cost, workers' wages, local policies, etc.