What is the best way to go chengde from dongsi beijing?

From Liuliqiao Bus Station, you can find frequent buses to reach Chengdu directly.
From Dongsi, you can take the subway line 6 to reach Baishiqiao South Station where you can change to line 9 to reach Liuliqiao Station. Get out of the station from Exit C, you can easily find the Liuliqiao Bus Station.
The subway fare is 2RMB and the bus fare to reach Chengdu is around 85RMB per person. The bus ticket to Chengdu is not needed to buy in advance. The time to Chengdu cost around two hours.

what is the best way to go Chengde from Beijing South (back from tianjin)?
Beside, do you have any ideas how to go Xing Ye Village, Chengde?

And chengde vs. Chengdu is same place???

The road is name chai chang hutong, which near by the tianyuan lou. Any public transport can access to there? Or any suggestion place to stay in chengde?

At BJ South Railway Station MTR Station, take subway line 4 to Xuanwumen, where transfer to line 2 to the local main Railway Station. At the station, you can take a train to Chengde.

Oh, Chengde and Chengdu are different places. The former is at Hebei province and the latter is at Sichuan province.

And it seems that the local Shizhengfu bus stop and Xiaonanmen bus stop are near the Chaichang Hutong. Bus no. 5, 2 or 29 can take you to Shizhengfu station and bus no. 11 or 15 can take you to Xiaonanmen Station.