1. Number of exhibitors: First of all, consider the number of exhibitors. The more exhibitors, the more drinking water you need.

2. Exhibition time and weather conditions: The longer the exhibition time, the hotter the weather, the more water exhibitors need to consume, and they need to reserve enough drinking water.

3. Water supply and convenient transportation: water quality and price should be considered when selecting water suppliers.

4. Other factors: It is also necessary to consider the influence of factors such as the booth area and the types of exhibits on exhibitors, as well as other possible emergencies (such as power failure and water stoppage). Therefore, it is necessary to make adequate material reserves and crisis response measures in advance.