March 25，CCTV Finance《Economic Information Broadcasting》Series of reports《Simulcast investigation·“Zhi Zao”Look at foreign trade on the chain》Walk into the production workshop of Railway Construction Heavy Industry，Focus on independent R & D and overseas application of heavy equipment in big countries。It is reported that the Shield Machine technology of China Railway Construction Heavy Industry has been continuously upgraded.，Create high-end customized intelligent products，Actively practice“Overseas priority”Development strategy，Continue to expand overseas“Circle of friends”，So that the export of heavy equipment of big countries has sufficient strength.。