Speaking of the privacy track on Ethereum, there is a project that has been quite hidden - the kind that has been quietly working for 7 years on this chain.

The first time I came across it was three years ago. Back then, the functionality was quite rudimentary, but the technical approach exuded a sense of "not following the usual path." Later, I discovered that the founder had tinkered with a smart contract language in their early years, and the syntax design was quite adventurous; they had even specifically thought about how to use it. Unfortunately, this thing didn't survive the market selection, and in the end, the project team cut it themselves.

However, these people have not been idle. In recent years, they have developed a zk universal programming language, which is now being used as the underlying logic for many zero-knowledge proof projects. From early prototypes to now becoming part of the infrastructure, the path of technological iteration has become increasingly stable.