The time traveler became the third ancestor of Buddhism and created a systematic system of Buddhist ideas.
But he is not the only time traveler, just one of them
It seems that I only have this one book about Buddhism that travels through the prehistoric times. This book mainly tells the story of the protagonist who travels to the prehistoric West, where he transforms into a Western form and recognizes the two sages of the West as his father, and becomes a Buddhist son of the West. (Of course, I haven't finished reading it, so I'm not sure what the plot will be later.) Recommendation index, four stars