Daily Chinese Idiom Guessing Game
Describes something that is growing vigorously and irresistibly, like a prairie fire.
荼茅草的白花。象火那样红，象荼那样白。原比喻军容之盛。现用来形容大规模的行动气势旺盛，气氛热烈。
《国语·吴语》万人以为方阵，皆白裳，白旗，素甲，白羽之缯，望之如荼。……左军亦如之，皆赤裳，赤，丹甲，朱羽之缯，望之如火。”
The movement spread like wildfire, growing with ru huo ru tu momentum.