A ban is put into force in the province twice a year - in Xingkai Lake from June 6 to July 20, and in Heilong River and Wusuli River, on China's border with Russia, from June 11 to July 15 - during which all fishing activities are forbidden.
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Autumn's fishing ban this year runs from Oct 1 to 20 along Heilong River and Wusuli River.
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"Heilong River has been implementing the fishing ban since the 1950s to maintain ecological balance," said Yu Qinghai, a retired fishery expert.
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The bans protect spawning seasons for different kinds of fish living in these waters, so the main objective is to ensure the survival of young fish, Yu said.
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Among the 360 households in three villages in Kunhe, 34 families have fishing licenses and own fishing boats.
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At midnight before the first day o3,250) from fishing every year, which is about twice the income of farming.Â