For transferability test, we choose eight pairs of OHS images, and each pair contains one source image (S) and one target image (T): S1: Changchun T1: Jilin S2: Wuxi T2: Shanghai S3: Guangzhou T3: Zhongshan S4: Xining T4: Lanzhou S5: Hetian T5: Kelamayi S6: Anyi T6: Nanchang S7: Changde T7: Changsha S8: Tianjin T8: Tangshan The 26 OHS images except for the eight pairs: O1: Baoding O2: Chongqing O3: Fujin O4: Huainan O5: Huhehaote O6: Jinzhong O7: Luliang O8: Manasi_1 O9: Manasi_2 O10: Nanmulin O11: Neimenggu O12: Qingdao O13: Qinghuangdao O14: Shawan O15: Shenyang O16: Shuozhou O17: Songpan O18: Taian O19: Tongjiang_1 O20: Tongjiang_2 O21: Wuzhong O22: Xundian O23: Xuzhou O24: Yidu O25: Zangzu O26: Zhongshan The image patches have been normalized and scaled by 10000 to reduce storage cost. Divide the pixel values by 10000 and then the image patches can be used directly.