不亢不卑
English Expression:
  1. n.  show neither inferiority nor superiority
  2. n.  be cordial but independent
  3. n.  Neither haughty nor humble
  4. n.  neither overbearing nor servile
  5. n.  neither supercilious nor obsequious
French Expression:
  1. adj.  n'être ni arrogant ni servile, ni hautain ni obséquieux