  We discuss the hypergeometric solutions of the quantized
Knizhnik-Zamolodchikov (qKZ) equation at level zero and show that they give all
solutions of the qKZ equation. We completely describe linear relations between
the hypergeometric solutions and give an interpretation of the relations in
terms of the quantum group $U_q(sl_2)$ at $q=e^{\pi i/2}$.
