On July 24, the one-way expansion joint for 60kg/m rail for curve line of 350km/h slab track, manufactured and laid on trial by CRBBG and representing the highest technology in China at present, passed the review organized by the Technological Department of China Railway Corporation. Leaders and experts from China Railway Corporation, China Academy of Railway Sciences, Shanghai Railway Bureau, Taiyuan Railway Bureau and Datong-Xi'an PDL Company, and CRBBG Deputy General Manager Dong Yanlu, were present at the review meeting.

This expansion joint adopts integrally vulcanized iron plate and buffer gauge block with the function of adjusting the radius of curve, and the material, technology and process for it take the leading position in China.