"Disproofs of Riemann Hypothesis" by Jiang Chun-Xuan makes the extraordinary claim that there are in fact no zeros of the Riemann function in the critical strip. Three proofs are offered for this claim; in the first on p. 4, it is incorrectly claimed that the phase of the zeta function is independent of the real part of the argument (equation (9)); this is said to be based on equations (5), (6) and (7), whereas equation (6) explicitly exhibits the dependence of the phase on the real part of the argument. The same mistake is made in the second proof. In the third proof, the factor exp (-itm log p) from (36) is missing in (39), leading to an incorrect conclusion in (38) (which would have implied that the logarithm of the zeta function is always real).