Traveling through the second dimension usually referred to traveling or living in a fictional two-dimensional world. To travel through the 2D world, some basic conditions had to be met: Possesses the ability to travel through time and space. This ability was usually called " time travel." 2. Have enough time and resources to live a meaningful life in the two-dimensional world. The resources and environment in the two-dimensional world might be even more scarce than in the real world. 3. Have an understanding of the 2D world in order to adapt to the 2D culture and lifestyle. Have a certain adventurous spirit and are willing to accept a journey that may be full of challenges and dangers. There were several ways to travel through the 2D world: 1. Look for opportunities in novels. Many novels contained the element of transmigration, which might provide the opportunity to transmigrate to the second dimension. 2. Take part in time-travel games or anime activities. Some game or animation production companies would create time-travel games or animation participants could travel to the two-dimensional world through games or animations. 3. Read related books or information. You can find relevant books or materials in the library, bookstore or online to understand the history, culture, lifestyle, etc. of the two-dimensional world. No matter which way you choose to travel through the 2D world, it is a journey full of challenges and opportunities. It requires enough courage, wisdom, and perseverance.