.Fisherman's Work on the Heihe River in Tianjin Winter
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and this how it works under ice in winter. |
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Drill holes into the ice. Attach the ends of the net to a closed tin can filled with air and stuff it through one hole under the ice.
Then capture the tin can with a magnet and drag can with attached net to the other hole.
Fish, hopefully, will show up after some while. |