Travel Through Time to Become a Crown Prince and Develop GDP to the First Place

What should I do if my grandfather is a time traveler? At the beginning, he became the crown prince of an island in Nanyang. In order not to be overthrown, Xiao Tianlin had to serve the "big men" in the country. Vigorously develop the economy and increase people's income. Slowly, this country with a per capita income of less than 8,000 US dollars has developed to more than 200,000 US dollars per capita, becoming the first in the world. It has been rated as the country with the highest happiness index in the world by magazines around the world. It is the paradise that countless people dream of. Because in this country, you don't have to worry about getting sick or having money for medical treatment, free medical care for all, free education, no house, zero-interest mortgage, or the pressure of life. The royal family spends money from time to time. In this country, even a sweeper can earn a monthly salary of US$20,000... Ps: Farming development stream light battle for hegemony This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.