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Travel route planning aims to map out a feasible sightseeing itinerary for a traveler covering famous attractions and meeting the tourist's desire. It is very useful for tourists to plan their travel routes when they want to travel at unfamiliar scenic cities. Existing methods for travel route planning mainly concentrate on a single planning problem for a special task, but is not capable of being applied to other tasks. For example, previous must-visit planning methods cannot be applied to the next-point recommendation, despite these two tasks are closely related to each other in travel route planning. Besides, most of the existing work do not consider the important auxiliary information such as Point of Interests (POI) attributes, user preference, and historical route data in their approaches. In this paper, we propose a flexible Multi-task Deep Travel Route Planning framework named MDTRP to integrate rich auxiliary information for …