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1. H. H. Ling, Designing Office, American Bridge Co., Pencord, PA. USA., 1916
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2. H. H. Ling, Bridge Engineer, Peking-Hankow Ry. inspecting the Yellow River Bridge (2100M), 1922
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3-4. H. H. Ling. Bridge Engineer, Peking-Hankow Ry., leading a team inspecting many bridges along the line, 1929
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5. H. H, Ling, Inspecting an ancient stone bridge near Paoting, 1929
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6.H. H. Ling, Chief Engineer, Lunghai Ry. Western Section, locating the line near the gate of Tungkwan, 1929
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7. H. H. Ling, Chief Engineer, Lunghai Ry, finding a bridge site across a river, 1932
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8. H. H. Ling, Chief Engineer, Canton-Hankow Ry. (center holding hat) inspecting a bridge and a tunnel under construction, 1933
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9. H. H. Ling, (right), Chief Engineer, Canton-Hankow Ry. inspecting a bridge under construction, 1934
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10. H. H. Ling, Chief Engineer, Canton-Hankow Ry. driving the last spike to complete the N-S Trunk Line (1096 Km), 1936
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11. H. H. Ling, Chief Engineer, Canton-Hankow Ry. Driving the last spike to complete the N-S Trunk Line, 1936
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12. H. H. Ling, (center, front row, holding a hat) Chief Engineer, Canton -Hankow Ry. during the inaugurations of first passenger through train from Canton to Hankow (1096 Km), 1936
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13. H. H, Ling, Chief Engineer, Canton-Hankow Ry. Inspecting the whole line after completion, 1936
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14. H. H. Ling, China's chief delegate to the 14th International Congress. Lucern, Switzerland, when presiding a fourth Section, 1947
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15. H. H. Ling, one of the commissioners, Shihmen Dam Project, Taiwan, inspecting the dam near completion, 1965
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Portrait at age 80, 1974