Liu Zi never knew what his future would be like. For most of his life, he just took things as they came.
Wei Boxi clearly knows that he will definitely get what he wants. No matter what the process is, the result is ultimately under his control.
They warm each other and become each other's source of light in this indifferent world. If they are destined to find another semicircle, why not believe that the one around them is exactly what they are looking for?