This 1 August 2018 video says about itself:
Thousand-year-old salt lake shining like a painter’s palette in north China
Sweltering temperatures have caused a thousand-year-old salt lake to turn brilliant colours recently in Yuncheng City, north China’s Shanxi Province.
Small crustaceans, algae cause these colours in these dry circumstances.
Dear Kitty. Some blog 
Wow, this lake looks so good, very beautiful.
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Yes, very beautiful indeed! It reminded me a bit of these fields in Italy:
https://dearkitty1.wordpress.com/2018/07/24/many-beautiful-flowers-in-italy/
though in Italy the cause of the colours were flower seeds, not algae or crustaceans.
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Thanks for sharing this video with us. It looks really natural and relaxing.
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Thanks for your kind words! Best wishes for you and your blog 🙂
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Thank you, you too
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🙂
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