Gjennomsnittlig GPS-koordinater for postnummer 300121: 39.147, 117.157
Notering byer:
>> Beixiaodaozi/(北小道子)等 300121, Tianjin/天津, Tianjin City/天津市, GPS-koordinater: 39.14662,117.15718
Notering byer:
>> Beixiaodaozi/(北小道子)等 300121, Tianjin/天津, Tianjin City/天津市, GPS-koordinater: 39.14662,117.15718