Fan Ripple Knitting Stitch.
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So where is the guide to indicate what the symbols mean? I love this but cannot find pattern to make.
Chart for the fan ripple stitch is not helpful at all.
These are Russian knitting symbols, you can see them here: https://www.knitting-bee.com/free-crochet-patterns/crochet-amigurumi/russian-english-knitting-chart-translation
Line that goes up is knit, horizontal line in purl, u is yarn over, triangle with a 2 below it is k2tog.