The photo shows WONG TS’ÜN-SHIN (王存善) on the right and JAMES HALDANE STEWART LOCKHART second from right in the front row.
Quite likely the European standing between Lockhart and Wong is Mr. ROBERT DALY ORMSBY, Director of Public Works.
The photo was taken on the 17th or 18th March, 1899.
For the story behind this photo see: The Anglo Chinese Boundary 1898