what is the bus number from chaoyangmen to sihui long distance bus station? or how to get there by subway?

If you want to take a bus, you can walk to the Chao Yang Men Nei Station to take bus line 609 Si Hui Shu Niu Station. Then you can walk to the Sihui Long-distance Bus Station.

If taking subway trains, you can take the subway line 2 to Jianguomen Station and then change to line 1 to Sihui Station. Get out of station from Exit A and then walk along the Jianguo Road to Sihui Bus Station. Personally speaking, taking subway line is suggested.