whAt is mr. zhAng
A．A proFEssor in univErsity.
B．A mEmBEr oF thE nEgotiAting group.
C．An oFFiCiAl oF thE ministry oF ForEign trADE AnD EConomiC Co-opErAtion.
D．An oFFiCiAl oF thE stAtE EConomiC AnD trADE Commission.