“…From Zhang et al, 26 we know that the operator Φ is hereditary and strong symmetrical and the isospectral hierarchy and nonisopectral hierarchy form an infinite-dimensional 𝜏-symmetry Lie algebra. Furthermore, the hierarchy (10) includes the Kaup-Newell equation, 27 the Chen-Lee-Liu equation, 28 the Gerdjikov-Ivanov equation, 29,30 the modified Korteweg-de Vries equation, the Sharma-Tasso-Olever equation, 31 and a new equation as special reductions. Now, let us work out the CLs from the Lax pairs.…”