English: Sitting, from left to right: Yang Heling, Sun Yat-sen, Chen Shaobai and You Lie. Standing: Guan Jingliang.
日期
香港歷史博物館 claims 1888, while 中国国家博物馆 claims 1892. 中国国家博物馆 (National Museum of China) doesn't actually claim 1892, they've added the incorrect date to the title of the picture. In the caption under the picture, the caption also contains the names of the five people in the picture, the 中国国家博物馆 (National Museum of China) states that the picture was taken in 1887.
1892年孙中山在香港西医书院学习时与友人合影. 中国国家博物馆「珍贵留影」部份. Archived from the original on 2019-09-19. "博物館對圖片說明:1887年,孙中山入香港西医书院读书。读书期间,孙中山和杨鹤龄、陈少白、尢列四人关心祖国命运,探讨各种救国方案,抨击清政府的腐败统治,被人称为“四大寇”。左起:杨鹤龄、孙中山、陈少白、关心焉、尢列。"