秤 in 天秤座 is traditionally read chèng (the scale reading), though many young Chinese say tiānpíngzuò under the influence of 天平 (tiānpíng, balance). Dictionaries still prefer chèng.
culture
Western astrology (西方占星) became mainstream among urban Chinese youth after 2010. 天秤座 is often stereotyped as indecisive, fair, and charming — a staple character label on dating apps.