There is only one company in Guangzhou that specializes in oracle skills training, specializing in data warehouse and data mining, as well as some advanced courses such as BI project management, RAC, Data Guard and oracle stream replication. As far as the whole country is concerned, no one has this course now. There's a training school that specializes in advanced skills training in Oracle Bone Inscriptions. It's very advanced, and that teacher Liu over there is really good. You'd better take time to see it.