News/ Picture news

  • OST Chairman Mr. Lv Hanchuan Was Interviewed by China Central Television Station (CCTV)

  • OST-INDIA Attends IGC-2017

  • OST Participated the 11th Asian Regional Conference of IAEG [ARC-11]

  • Company Statement of Infringement

  • Updates on Jiuzhaigou relief work-OST curtain-type protecting net demonstrates military product quality