Single Region Replica - A slave in the same region(location, e.g. China North) with master slave is a single region replica. ...

Single Region Replica
- A slave in the same region(location, e.g. China North) with master slave is a single region replica.
Cross Region Replica
- A slave in different region(location, e.g. Master instance in China North and slave in China East) is a cross region replica, the latency might be bigger than a single region replica.