2^th 8, 2004, Shannxi Investment Group Company, Changda Coal Chemical Co., Ltd and Shannxi Coal Chemical Group Co., Ltd has signed formally cooperation agreement.

25^th, 8,2005, Shannxi Xinxing Coal Chemical Science & Technology Development Co., Ltd has registered and founded.

11^th, 10, 2004, the project feasible research report has passed the examination.

12, 2005, the construction of equipment has finished.

1,2006, the first set of DMTO industrial examination of ten thousand-class has come into flow examination stage.

22^th, 6, 2006, the industrial examination has finished and all dates of technology process.

23^th, 8, 2006, China Petrol and Chemical industrial association has hold technology result appraise meeting of DMTO in BeiJing.

24^th, 8, 2006, Shannxi province government and CAS hold News issue meeting in Beijing to declare formally that the first world-class industrial examination of DMTO of ten thousand has succeeded in Shannxi.

28^th, 9,2006, Shannxi province Development and Reform Commission hold the Check and accept meeting of DMTO industrial examination in Xi’an.

19^th, 3, 2007, the project of DMTO industrial examination come into ‘2006 ten-top important innovate production of CAS’.

15^th, 8, 2007, the first DMTO of 200,000 tons has licensed to Shannxi Xinxing Coal Olefin Co., Ltd.

17^th 9,2007, the DMTO technology of 600,000 tons has licensed to ShenHua Group in Beijing.

Shannxi Xinxing Coal Chemical Science & Technology Development Co., Ltd market and license the DMTO technology of its own knowledge property right to the whole world from 2008.

25^th 11,2008, Name of Shannxi Xinxing Coal Chemical Science & Technology Development Co., Ltd was changed for Syn energy technology Co., Ltd.