Fig. 2
The distribution of castles of the Ming Great Wall in Qinghai Province; the photos of the No. 17, No. 18, No. 21, and No. 35 castles have been studied in previous research [24]
Fig. 2 | Heritage Science
The distribution of castles of the Ming Great Wall in Qinghai Province; the photos of the No. 17, No. 18, No. 21, and No. 35 castles have been studied in previous research [24]
