三桥 is most commonly
西安三桥 — a subdistrict in western Xi'an named for three Han-dynasty bridges that crossed the
渭河 near the capital Chang'an. Other
三桥 exist as village names across China. In 《
长安十二时辰》 and other Tang-set historical fiction,
三桥 is sometimes invoked as the western gateway to the imperial city.