Xianming Dou, Male, 1987.9.20, working in Alibaba Cloud as a developer for ApsaraDB RDS PostgreSQL's feature development, bug fixing, and production for PostgreSQL. A big fan of PostgreSQL, also interested in Cloud Computing, distributed database, analyze database etc. Alibaba Cloud is a high-tech cloud computing service provider, which is the biggest one in China and one of the top 3 in the world. We have built up a huge number of cloud services, among which the database service is one of the most crucial ones, providing service compatible with PostgreSQL/MySQL/SQL Server/Greenplum databases' protocols, as well as those NO-SQL ones.