Who Said I Can Work Hard All Day Long Because of Women?

I thought I was the only one who traveled through time, but I didn't expect that I would lead a group during time travel? Mi Ruohua, the daughter of the royal family of the Chu Kingdom, was actually the CEO of a large company before time travel, and she learned one thing after another. Zhao Daiji, the daughter of the Zhao royal family, was actually a famous medical doctor before traveling through time? And Yun Jinshu, the daughter of a local family, was an agricultural expert before traveling through time? "Your Majesty, smallpox is rampant in our country, Daqin. Concubine Zhao vaccinated her with cowpox. Our country, Daqin, has finally eradicated smallpox!" "Your Majesty, Concubine Lin has developed gunpowder and artillery. Its power is comparable to natural disasters!" "Your Majesty, Concubine Yun presented something called potatoes, saying that it can solve the problem of food shortage in our Daqin." "Your Majesty, Concubine Yang purified the salt and named it fine salt. It is crystal clear and snow-white. It is a rare high-grade salt." Huh? Wait? Is Gu's harem all composed of time travellers?