Quote API Overview 
Description Of Security Code 
The security code uses the ticker.region format, ticker represents the code, and example for each market:
- US Market: 
regionisUS, for example:AAPL.US. - HK Market: 
regionisHK, for example:700.HK. - CN Market: 
regionisSHfor Shanghai Stock Exchange andSZfor Shenzhen Stock Exchange, for example:399001.SZ,600519.SH. - SG Market: 
regionisSG, for example:D05.SG. 
Access Method 
- Use private protocol and long connection mode to access, please refer to Binary Communication Protocol for access method.
 - Use SDK for access, SDK introduction and download address.
 
Business Data Serialization 
The market request, response and push data are stored as business data in the body part of the data package of the private protocol. We use the Protobuf protocol to serialize business data. Compared with common text protocols (such as JSON, XML, etc.), the Protobuf protocol has the following advantages:
- Faster serialization time.
 - Smaller packet size.
 - Strongger version forward and backward compatibility.
 
Quote Protobuf protocol document download link.