Police: 110
Fire: 119
Ambulance: 120
Traffic: 122

Useful Inquiry Number: 114 (Mandarin)
If you can speak mandarin, this is a very useful number. They will search within their database for local information.
Press 1, for telephone numbers of local businesses and services
Press 2, to book internal/international flights
Press 3, to book hotels and accommodations
Press 4, to book a restaurant

Consumer Complaints Line: 12315 (Mandarin)
It will go straight through to a Chinese advisor in Bureau of Industry and Commerce.