From Jakarta to Shanghai, one direct flight of Garuda Indonesia Airlines is available on each Mon, Wed, Fri and Sunday. And there are several direct flights daily on both the Beijing-Hong Kong and Hong Kong-Jakarta route. From Shanghai to Beijing, you can take a train, such as D302 which costs about 10 hrs. For the details about train schedule and ticket price, you can search on the page: https://www.travelchinaguide.com/china-trains/