Tuanjiehu is better.

1. Convenient transportation: Compared with Shuangjing, Tuanjiehu is an artificial lake in the center of Beijing, and there are many subway stations around it, so it is convenient to travel.

2. Convenient entertainment and life: Compared with Shuangjing, Tuanjiehu has many shopping centers, entertainment facilities and dining places, which is very suitable for travelers to have entertainment, shopping and food tasting, which is convenient and fast.