One key to survival when lost outdoors is finding a way to let rescuers know where you are. This can be done visually or sonically, and a whistle is a great way to inform others of an emergency ...
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In a local community of Xuecheng District in Zaozhuang City, Guo Hongyan, a master of local clay whistle making, rekindled recently people's interest in handmade clay whistles with an interactive ...
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