1 Image

Kong Chang'an and Chang Youming

孔長安與常友明

1 Image

Kong Chang'an, Gao Minglu, Fan Di'an, and others with the New Measurement Group

孔長安，高名潞，范迪安等人與新刻度小組

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Photo by Kong Chang'an

孔長安拍攝的照片

1 Image

Photo by Kong Chang'an

孔長安拍攝的照片

2 Images

Photos by Kong Chang'an

孔長安拍攝的照片