Phoenix in the World: the Counterattack of the Cold Palace Princess

"Alternate History + Soul Transmission + Smart Female College Student + Princess + Machiavellian + Protecting Husband + Helping Her Husband ascend to the Throne" "Uh... I am the fourth child, how can I fight for the throne..." Mu Lingchen, the fourth prince of Beiyan, looked at his resourceful and domineering princess and said timidly... "Shit... What's wrong with the fourth child? There are still few fourth sons who have ascended to great positions in the past dynasties." Liang Qingying, a top student at Yan'an University with a lively personality, accidentally transmigrated into the body of an ancient princess... What made Liang Qingying dumbfounded was that the princess was actually thrown into the cold palace along with her mother. What made her even more devastated was that the ruthless queen, in order to deal with the powerful Bei Yan, subbed Liang Qingying and asked her to replace the eldest princess and marry a disabled prince of Bei Yunyan... After Liang Qingying married into Beiyan, in order to survive, she began to use her modern knowledge to make gunpowder, engage in economics, train new soldiers, outsmart the prince and several princes vying for the throne, design to win over and alienate powerful ministers from various factions, and stirred up the whole Beiyan court. She followed her husband in battles and made contributions, and finally helped her husband succeed in ascending to the throne. She also became the queen of Beiyan, the mother of the world...