I Used Science to Achieve Hegemony in Ancient Times

Time travel + historical hegemony + farming development + multiple female protagonists + not brainless and reasonable Programmer Zhang Chuang woke up and found himself an orphan in a fishing village on the coast of the East China Sea in Dayin. The family is surrounded by prisoners, surrounded by pirates, and taxed like a tiger. The beginning is a hellish difficulty. Fortunately, he discovered that he had a "search engine" in his mind that was not very bright. He could only ask three times a day, and he was still given principles and local methods - but this was enough for him who had seen modern civilization. No food? Search the intertidal shellfish map and take the whole village out to sea for a meal. Pirates coming? Search for simple city defenses and spear battle formations, and train the ragtag group into a monolith. No boat or money? Search for local salt-drying techniques and elementary navigation skills to raise the first sea caravan. Starting from a handful of salt and a boat, Zhang Chuang's journey took him to the entire ocean, then to the entire continent, and finally... To the entire planet. When his fleet rolled over the coastlines of Western countries, when nobles of different skin colors prostrated at his feet and offered princesses and scepters, when the territory of the empire was named "the sun never sets," everyone thought that this was the end of his hegemony. Only Zhang Chuang knows that all this is just the beginning.