Fecal Microbiota Transplant (FMT) Capsule for Improving the Efficacy of Anti- PD-1

FMT capsules administration starts in the first week of enrollment. Capsules are taken for three consecutive days in the first week. From week 2, anti-PD-1 therapy will be administrated in combination with the maintenance dose of FMT treatment once every two weeks for up to 6 times.