I Could Transmigrate Between Two Eras, and Rose to the Top of Life

Looking for Stories Where the Protagonist Travels Back and Forth Between Two Worlds, the Main World and Other Worlds

Travel between two worlds or multiple worlds, with one main world.

A Two-Way Portal Between Two Worlds

Tribes, Farming, Development: Come Share Your Recommendations!!!

The protagonist transmigrates to a primitive tribe and starts developing it through farming, gradually bringing everyone under one rule. System stories need not apply. A golden finger is fine as long as it isn't too over-the-top.

Transmigrating to Ancient Times and Building a Modern City

Are there any stories where someone transmigrates to ancient times and uses modern technology to build a city?

The Protagonist Connects Two Worlds, Traveling Between Them to Trade Goods

Transmigrating to Ancient Times and Giving Famine Victims Porridge, Then Building Up From KFC and Other Foods

Looking for books similar to Plenty of Rice Porridge and Pickles, Even I Could Do This.

Stories About Freely Traveling Between the Present and Ancient Times

Transmigrating back and forth between the future and ancient times.

I'm Out of Books to Read, Everyone. Anything Good Is Welcome

Any genre is fine, as long as it's good.