Take Metro Line 1 and Bus No. 45.

1. According to the Baidu map query, first, take Metro Line 1 from Xiamen North Station to Zhenhai Road Station via Station 22.

2. Secondly, walk 228 meters to Chinatown Station, take bus No. 45 for 5 stops to Xiamen University Nanputuo Station.

3. Finally, walk 26 meters to Xiamen University Siming Campus.