Then, we find the Yang-Baxter equation satisfied by the monodromy matrix defined through Lax operator. Infinite conserved quantities can be obtained by expanding the monodromy matrix repecting to the spectrum parameter.

• 接着找到了由Lax矩阵所定义的monodromy矩阵所满足的Yang-Baxter方程(YBE)，利用monodromy矩阵对谱参数的展开可找出无穷多守恒量，从而证明了此模型的可积性；