The picture shows a scene in the region of Guilin, which is famous for its karst mountains and the unsurpassed beauty of the Li River.
Guilin fishermen used birds (Cormorants) to catch fish. These large birds are tied to the fishermen but have enough rope length to dive for fish. They cannot swallow their catch because a ring device is placed around their throat hindering them from doing so. The fishermen often fish at dawn and use their long poles and lamps to light their way. The lights attract schools of fish and make it easy for the cormorants to catch them.