Just Writing a Letter, How Did He Become the Master of the Earth?

One day, Ye Xing received a toy postal car and unexpectedly gained the ability to write letters to the past. So, I wrote a letter to the past to save my father's life. Write a letter to Ren Zhengfei and become the largest shareholder. Writing to electromagnetic scientist Maxwell, the world has entered the 6G era 20 years ahead of schedule. Write a letter to Leonardo da Vinci and realize gene editing. Soon after, Ye Xing not only became extremely wealthy, but also changed history! From then on, the Dragon Kingdom surpassed the United States and became the world's hegemon! But gradually, Ye Xing discovered a shocking secret that could destroy the world... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.