Product ID of the same outbound air ticket: 34981605Product ID of equivalent round-trip ticket: 34981706 Day 1: Everywhere - Kashgar【Complimentary 24-hour pick-up/station service】 Day 2: Kashi - Karakul Lake - Kashi Day 3: Walk around Kashgar Day 4: Kashgar - various places [complimentary 24-hour airport drop-off/station service]