In the early years of entrepreneurship, I created products related to search and accidentally came across the concept of the Semantic Web (I bought a few books that I still haven't been able to throw away). At that time, it was called Web 3.0. It's been over a decade since Web 3.0 emerged, and the concept has been constantly changing (for the second time, Gavin Wood proposed a new concept of Web 3), but nothing has been realized. Now, agents and MCPs are very popular. Looking back at the books on the Semantic Web that I bought over a decade ago, both agents and MCPs feel familiar. These things have only changed in concept; the technology has advanced. But their origins date back a long time as well.