www.chinabuses.org: According statistics from CAAM, the top twenty engine manufacturer in the first five months are as followings: Yuchai, FAW, Quanchai, Weichai, Yunnei Power, Dongfeng Chaochai, Dongfeng engine, CNHTC, JMC, Yangchai, Laidong, Beiqi Foton, Changcheng, ISUZU, JAC, Nanqi, Shanghai Diesel engine, Dongfeng commercial vehicles, Chengdu Chengfa and Mianyang Xinhua.

 
Compared with last year, Yunnei Power decreased from No. 4 to No. 5, and it is also the only diesel manufacturers decreasing in the top twenty companies. Dongfeng Company Limited ranked No. seven from previous No. 11, and sales of engines grew 139.90%. And sales of Weichai, Changcheng, JAC, Dongfeng commercial vehicles, Mianyang Xinhua increased 131.98%, 162.79%, 128.39, 141.43%, and 101.16%.

 
There are mainly four listed diesel engine manufacturers, including Weichai Power, Quanchai Power, Shanghai Diesel, and Yunnei Power. And Weichai Power is leading on operation revenues, net profits, and net profit margins, especially their net profit margins has reached 10.67% in the first quarter.

 
And Yunnei Power is the only company in the four companies with decreasing figures on the three aspects, However its net profit margins were still higher than Quanchai Power and Shanghai diesel.