Harbin is to the north of Beijing.
in +方向+of+地点名词表示包含在该地方里
如：Fujian is in the south of China.
福建在中国南方.
to+方向+of+地点名词表示不包含在该地方里
如：Fuzhou is to the north of Xiamen.
福州在厦门北部.