G4201, known as the Chengdu Ring Expressway, and G4202, known as the Chengdu Second Ring Expressway, are two concentric orbital highways encircling the city of Chengdu. The distance between these two expressways typically ranges from 15 to 25 kilometers depending on the specific location along the routes. G4201 serves as the inner beltway, situated approximately 10 to 15 kilometers from the city center, while G4202 is the outer beltway, located significantly further out at a radius of roughly 30 to 45 kilometers from the urban core. This gap between the two rings contains several satellite towns and development zones, and travelers transitioning between the two highways can utilize various radial expressways such as the Chengdu-Chongqing or Chengdu-Mianyang expressways to complete the journey in about 20 to 30 minutes under normal traffic conditions.