# Research on the Trusted Traceability Model of Taishan Tea Products Based on Blockchain
## 3 Design of Blockchain-Based Traceability Model for Taishan Tea  
### Design Ideas  
Taishan tea products are divided into green tea, black tea, yellow tea, and other varieties. The production process is complex, including planting, picking, processing, warehousing, and the sales of five major links. Among them, the processing link is more complicated, and different tea species need to use specific processing technology; the link in the acceptance of raw materials, acceptance of auxiliary materials, killing, drying, fermentation, kneading, drying, and so on, for the quality and safety of the key points, as well as the need for enterprise control and government supervision. Aiming at the whole industry chain of Taishan tea products and the key points of quality and safety in each link, the design of the Taishan tea product quality and safety credible traceability model can not only realize the whole process of quality and safety traceability of Taishan tea products but also ensure the authenticity and credibility of the traceability data. In order to achieve a high degree of transparency of information and enhance the trust of all parties involved in the Taishan tea industry chain, we propose a blockchain-based Taishan tea traceability model that ensures that all parties in the Taishan tea industry chain can trace the relevant information. Our goal is to realize the traceability of the entire Taishan tea industry chain and enhance the trust and transparency associated with it. In order to ensure the quality and safety of the entire Taishan tea industry chain, we designed a credible traceability model for Taishan tea product quality and safety, which can both track the quality and safety of the entire Taishan tea production process and ensure the authenticity and credibility of the recorded traceability data. (1) Integration of blockchain and traceability systems  
Blockchain technology is applied to solve the problems of the traditional Taishan tea product traceability system, such as centralized management and low data credibility. Blockchain technology can improve the transparency and security of data and ensure the reliability and non-tampering of Taishan tea product quality and safety information. The data types involved in Taishan tea products are shown in Figure 1, which divides the data, in which part of the planting information data, the administrator data of each link, and so on, are non-uplinked data, and the planting, picking, warehousing, processing, and logistics data of each link are uplinked data. Combined with the design idea of \"one link, one ledger\", separate ledgers are set up for each link's traceability data to store key traceability data. This design not only reduces the amount of data uploaded by the traceability system but also greatly alleviates the efficiency problems caused by uploading a large amount of system data. Through visits and research in Taishan tea enterprises and communication with Taishan tea consumers, we accurately identify and determine a series of key factors affecting the quality of Taishan tea. For the Taishan tea industry chain, we accurately collected these key data with the help of IoT devices. These data are then carefully categorized into two main categories: uplinked data and non-uplinked data. The on-chain data refers to the information encrypted by blockchain technology and stored in the distributed ledger, which is crucial to ensure the authenticity and tampering of Taishan tea traceability, while the off-chain data may contain some auxiliary information that does not have high real-time requirements or requires specific processing before considering whether or not to be on-chained. Such categorization not only improves data processing efficiency but also enhances the flexibility and practicality of the traceability system.