Invincible, Summon the Most Powerful General of the Sui and Tang Dynasties!

[System + Strategy + Only Recruit Strong Generals] When I woke up, I became the Lord of Dongfu Mountain, and under my command was Yuwen Chengdu, the most powerful general of the Sui and Tang Dynasties. Together with me, we conquered the world forever. The system is simple: you can gain joy points by teaching admiring strong women. Once you gain joy points, you can summon powerful generals. Summoning powerful generals can teach more powerful women, a perfect closed loop!