The pseudo rod drop and pseudo rod ejection tests are unique commissioning physics tests performed on the first-of-a-kind HPR1000 Pressurized Water Reactor (PWR). The purpose of these tests is to verify the conservatism of the safety analyses for rod drop and rod ejection accidents through core flux distribution measurements, and to validate the accuracy of nuclear design software models under these transient conditions. This paper analyzes the pseudo rod drop and ejection test procedures during the first fuel cycle commissioning of a PWR, quantitatively analyzing the impact of initial xenon oscillations on test measurements. Quantitative requirements for the convergence level of core xenon oscillation during the pseudo rod drop and ejection tests are provided. An optimal control strategy for axial xenon oscillation suppression is presented, and the feasibility of the strategy is validated through on-site tests.