A Study of IPM514 in Patients With Esophageal Squamous Cell Carcinoma.

"2 primary immunization cycles: IPM514 will be administered once a week (QW) for 3 consecutive doses per cycle, there will be a 2-week interval between the two cycles.~Maintenance treatment: 6 doses administered every 3 weeks (Q3W), and 4 doses administered every 6 weeks (Q6W), if treatment continuously benefit the participant."