How does Beijing, a vibrant international city, respond to diverse needs of its 21 million residents? With the Beijing Forum on Swift Response to Public Complaints coming up on December 18, CGTN takes you to explore the 12345 hotline – a 24/7 service that handles daily inquiries and urgent complaints. Offering support in eight languages, it's a key resource for navigating life in this megacity. Let's find out how it works and what makes it effective.