Yatta's, Lumen's, and Vrexio's solutions work atm for 4-8, and I found one as well, they all have early Moon Water->Chain Sword in common. Vrexio's is the best though, what I would consider "correct". Mine:
Moon Water->Chain Sword, Spirit Gather lv2->Spirit Gather lv1, Rule Sky->Raven, Flash Wind->Normal Atk.

For 4 - 8 i tried the solutions in comment but doesn't work. So i found another way and it worked

It's : Spirit Gather Citta Dharma lvl 2 ; Rule Sky Sword Formation ; Moon Water Sword Formation ; Chain Sword Formation ; Cloud Sword Flash Wind ; Spirit Gather Citta Dharma lvl 1 ; Raven Spirit Sword ; Basic Attack

4-8 solution
Moon Water Sword Formation, Chain Sword Formation, Cloud Sword Flash Wind, Spirit Gather Citta Dharma, Rule Sky Sword Formation, Spirit Gather Citta Dharma, Raven Spirit Sword, basic attack

For chapter 5 can refer https://www.bilibili.com/opus/987270504453767193

https://imgur.com/a/4-8-solution-TvpCCHx

Guide for 4-8. You win by having more hp after reaching the final round.

yo does has anyone beaten chapter 5 yet?

Excuse me, but how do i beat 4-8?

The best and only guide on how to pass of these fng missions
P.s. Idk Chinese, but to make u happy, east friends, I'll write this - 我愛你