I found this online: Historically, the Double Ninth Festival was viewed as a day when heavy, potentially dangerous yang energy peaked, making it a time dedicated to warding off illness and avoiding misfortune. Because the holiday's traditional focus is anchored in protection, safety, and elder well-being, wishing someone "peace and health" (ān kāng) is considered much more meaningful and culturally accurate than a lighthearted "happy holidays". Sunday is the Double Ninth Festival in China, so To everyone, "Chongyang Ankang" (重阳安康), "Wishing you peace and health on the Double Ninth Festival"!!