If you don't like a slow pace, you can start reading after Chapter 80. It won't affect your enjoyment much.
Zhang Xing transmigrates by accident to an ordinary parallel version of the Three Kingdoms era and becomes Zhang Fei's younger brother. The overall pace is on the slow side.
Zhang Xing uses the rules of his portable storage space to stockpile food on a massive scale.
He studies civil affairs under Lu Zhi and leverages his influence to develop. He studies martial arts under Li Yan and recruits Zilong. Together with Hua Tuo, he opens up a Three Kingdoms era of martial arts.
“Master, Martial Uncle, Doctor Yuanhua, has there been any progress in studying qi and blood?” Zhang Xing asks Li Yan, Tong Yuan, and Hua Tuo.
On the arena platform,
Lu Bu shouts, “Yide, I've made a new breakthrough in my Overlord's Might. Dare to come up here and fight me?” As he speaks, qi and blood surge through his body, and a faint phantom of qi and blood envelops him. He points the Fangtian Halberd in his hand at Zhang Fei below.
“Like I'd be afraid of you.” Zhang Fei leaps onto the platform, swings his eight-zhang Serpent Spear, and a serpent-shaped phantom coils around him.
It's still too slow, but with Liu Bei and Zhang Fei, it's okay! [Thinking] Is there any prime-year Huang Zhong fighting against Lu Bu?