Exploring the smart contract features of the TON blockchain platform, including its unique asynchronous messaging mechanism, account model, and gas fee model. The article provides a detailed analysis of the TON blockchain architecture, including the design of the main chain, work chains, and shard chains, and how they work together to enhance network throughput and scalability. It also emphasizes the security issues to be mindful of when writing smart contracts and offers practical advice and best practices to help developers avoid common security vulnerabilities.