Click "Miller Avenue" on the map, and then enter "KFC restaurant" in the scene. Click Qiqi to get the task (see the picture below, follow the point circled by me)

Take the second task above.

Enter Nilata in turn-enter the sky tree to find Buduoduo-follow the prompts to return to Nilata-talk to the old man and finish the game, and then enter the western amusement park-the task is completed.