Where is the southern suburb observatory often mentioned in Beijing weather forecast?

Nanjiao Observatory is located in Yizhuang Development Zone, Daxing District. Take bus No.732, No.723, No.927, No.927 (extension line), Yuntong 1 15, and Yuntong 202 and get off at the north exit of Yizhuang (Pok Oi Hospital), and get there on the east side of the road. Drive from the South Fifth Ring Road from east to west to Chengshou Temple (17A) and turn right at the main road for 70 meters. Or from the South Fifth Ring Road from west to east to Santaishan exit (50 meters before Yizhuang exit), turn right ahead, turn around and cross the bridge, and then walk 70 meters ahead. Drive from Xiaocun Bridge in South Fourth Ring Road to Yizhuang direction (south), turn around at the north exit of Yizhuang, and then return to the north exit of Yizhuang.