Belgian Prime Minister Elio Di Rupo (C) visits the company of Techspace Aero, a member of Safran Group, which is a leading player in aerospace propulsion evolution, in Belgium's Herstal, on May 31, 2013. (Xinhua/Wang Xiaojun)

Belgian Prime Minister Elio Di Rupo visits the company of Techspace Aero, a member of Safran Group, which is a leading player in aerospace propulsion evolution, in Belgium's Herstal, on May 31, 2013. (Xinhua/Wang Xiaojun)

Belgian Prime Minister Elio Di Rupo (L) visits the company of Techspace Aero, a member of Safran Group, which is a leading player in aerospace propulsion evolution, in Belgium's Herstal, on May 31, 2013. (Xinhua/Wang Xiaojun)

A worker works at the company of Techspace Aero, a member of Safran Group, which is a leading player in aerospace propulsion evolution, in Belgium's Herstal, on May 31, 2013. (Xinhua/Wang Xiaojun)

A F-16 fighting falcon is seen at the company of Techspace Aero, a member of Safran Group, which is a leading player in aerospace propulsion evolution, in Belgium's Herstal, on May 31, 2013. (Xinhua/Wang Xiaojun)

Belgian Prime Minister Elio Di Rupo (L, Front) visits the company of Techspace Aero, a member of Safran Group, which is a leading player in aerospace propulsion evolution, in Belgium's Herstal, on May 31, 2013. (Xinhua/Wang Xiaojun)