Recently, with the development of blockchain technology, people not only regard blockchain as a tradable cryptocurrency but also pay attention to other areas where blockchain technology can be applied, such as high-value assets (art, diamonds, etc.). Through the study of some existing blockchain-based platforms for high-value assets, we find that the blockchain ecosystem in this emerging industry presents a state of blooming but isolated from each other. In view of the problem, we discuss some projects based on cross-chain technology and believe that using cross-chain technology is one of the best solutions. Therefore, we propose the ACCTP (Asset Cross Chain Transaction Platform) model to connect different blockchain-based transaction platforms. The model is divided into three cross-chain service layers, called C2IE, C2AE, and C2TS, which are designed to implement the functions of information exchange, asset exchange and transaction exchange respectively.