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the 10th anniversary of Chinese Journal of Construction Machinery. In order to celebrate the 20th anniversary of the association and the 10th anniversary of the journal, we will hold the following activities this year. 1. Continue to convene the fourth International Conference Symposium of 2013 on Construction Machinery and Vehicle Engineering Research Progress. 2. Continue to convene the fifth National Mechanical Engineering Doctoral Forum. This forum will be held in Xuzhou and the time is from August 20 to August 24 in 2013. 3. The highlevel expert forum will be held during Changsha Engineering Machinery Parts Expo. A dialogue will be taken on the issues of industry scientific innovation, accessories, testing and quality among universities, research institutes and enterprises. 4. The celebrations about the 20th anniversary of the association and the 10th anniversary of the journal will be conducted in Shanghai. The coun cil of the new editorial board and the executive director is convened for summing up the work of the association since it was founded 20 years ago and the work of the journal since it was founded 10 years ago, and planning for the future development. This International Conference is held in the circumstance of international economic crisis and domestic industrial structure adjustment. In the past year, sales market of construction machinery has been subjected to a certain shocks, and the enterprises have en countered a certain difficulties. For the future, however, I believe that such difficulties are temporary, and the prospect is bright. The construction machinery is to serve the mining and state infrastructure construction, and for China, along with most c ountries in the world which are developing countries, the infrastructure construction is still a significant part in the course of development, and the sound infrastructure will promote the development of their economies, even these countries which are in the leading position in economy development also attach great importance to the improvement of infrastructure. Therefore, construction machinery is indispensable and has a rigid demand. Currently, the international competition has not been only limited to terrestrial, since the possession of terrestrial was a foregone conclusion, but there will be more