Is the New Emperor Weak? Watch Me Rule the Country with Artillery

He traveled through time and became the king of a country, but was regarded as a puppet by the prime minister and queen. He directly killed and decisively attacked, and used modern knowledge to quickly strengthen the country. In a very short period of time, he solved the threats of various countries, conquered many courtiers, and cultivated invincible masters! Start a new era! Love the country and also love the beauty!