Tears! Dress up as a Four-Year-Old Qin Princess and Save the Qin Dynasty

Who knows, my family! A female college student stayed up all night revising her thesis until her eyes went black and she died suddenly. When he opened his eyes again, he traveled to the Qin Dynasty in 215 BC and became the four-year-old baby Ying Hehua. She was also the youngest daughter of Qin Shihuang and the biological sister of Prince Fusu! As soon as the time travel landed, a "ding" sounded in Ying Hehua's mind, the "Great Qin Heaven-defying Fate Changing System" was successfully bound! Signing in can unlock a variety of magical props, from modern high-yielding grains to advanced forging secrets. The Qin Palace is treacherous and full of dangers. If you are not careful, you will be doomed. But Ying Hehua has historical knowledge and systematic "black technology" at his side, so he is not panic at all. She came up with high-yielding grain seeds to solve the food crisis of the Qin Dynasty; she also used forging secrets to improve weapons, so that the army's combat effectiveness soared, and Qin Shihuang and his ministers were shocked from ear to ear. At first, Ying Hehua only wanted to use what he had learned to help Da Qin get out of trouble, and he never coveted the throne. But there is no way, my father will pamper me as long as he pampers me. In this process, Ying Hehua relied on his wisdom and systematic help to get to know talents and save himself from danger time and time again. Her ability and courage were highly recognized by Qin Shihuang, and she received strong support. In the end, Qin Shihuang overcame all objections and established her as the crown princess. However, the road ahead remains difficult. How can this four-year-old baby continue to survive in the crisis-ridden palace by relying on the system and modern knowledge? Can she rewrite history and let the Qin Dynasty last for thousands of years? Can it help Qin Shihuang realize his dream of living as long as Tianqi? Can the world only speak Qin language? (This is my first time writing a novel, so it's not so rigorous, so please don't go into details)