There are many ways to travel to the 2D world. The following are some common methods: 1. Use the "two-dimensional artifact": The two-dimensional artifact is a device that allows people to enter the two-dimensional world, such as "two-dimensional glasses","two-dimensional camera", etc. These devices could allow the user to enter a two-dimensional world by injecting two-dimensional energy into them. 2. Take part in "2D activities": Many 2D activities such as anime shows, game shows, etc. will provide opportunities to travel to the 2D world. In these activities, you can experience the 2D world with other 2D enthusiasts. 3. Use the " Two-Dimensional Portal ": The Two-Dimensional Portal was a device that could transport people to the Two-Dimensional World. These portals usually appeared in novels, comics, and other works. If you have related novels, comics, and other resources, you can try to find these portals. 4. Become a "two-dimensional character": In some novels, comics, and other works, the protagonist can travel to the two-dimensional world in some way. If you think you can become a 2D character, you can try to make yourself look more like a 2D character through some technical means such as painting, modeling, etc. It was important to note that these methods had certain risks that could cause harm to the body. Therefore, please make sure that you can bear the risk before you carry out any action to travel through the second dimension.