Alright, I'll regularly update this with tips and tricks that were needed for the game. I'll add spoiler tags for what I feel are spoilers (some of the quests I feel are not spoilers since they're revealed to you as soon as you enter the chapter, but you're stuck searching for the quest giver.).

This is better translated to "Have not reached the point in story for quest to activate yet." Some of the quests only activate when you reach certain chapters, this includes quests in earlier towns that might not activate until you reach one of the later chapters.

Think Tales like map bosses, each boss is lvl 50, has at least 150K HP; generally drops a high level armor and a miracle. You can also put the map boss in your battlefield guardian slot (pretty solid bonuses).

As soon as you can use the crafting cauldron, go to a shop, purchase healing powders (100/ea) and mana powders (100/ea). The cauldron let's you fuse them into revival pills, that sell for 500/ea (profit of 300). Do this until you're rich. This also solves the "AI burns all mana powders" issue.

You can only buy things at 99/time, but you can craft unlimited amounts at a time, and sell unlimited amounts at a time.

For the most part, spamming Muyue's 2nd magical attack AOE spell will carry you through the first 70% of the game.

At a certain point in the game, you get the coin-op armor, better known as Pay-to-Win armor, this converts physical damage taken into money lost, you can finish most fights without taking damage but spending around 6000 bei, including bosses. This doesn't block damage over time however (which comes into play later in the game).

All Ch 1 quests are missible

Qumeng Ch 5. "The Test" Quest
This quest is missable and he quest giver does not have an exclamation point. You must use Fengyu to talk to the soldier next to Soldier Ma. Then talk to Soldier Ma who gives you 3000 bei, leave the town, then come back in Chapter 6 and return 3000 bei to Soldier Ma.

All character specific quests are missable
These quests are also chapter activated, but you will be informed by yellow question marks or exclamation points on the map The character specific quests reveal more about the inner thoughts of main characters, but they can only be activated at specific times and will be unavailable if you skip them. Just go back to each town until you deplete all the exclamation points.

There is a point of no return in the game, the game will warn you when it happens.

Unless you want to obtain achievements, you don't really need to bother with boosting the level of Miracles, or infusing monsters to make other monsters.

The only useful crafting is the weaponry, however a lot of the weapons that you get through quests/drops are almost as good.

Some walkthroughs are translations of the original PC version of Gate of Firmament, which has a completely different combat system and infusion system as well as different quests.

When a character has finished speaking, press confirm to continue the conversation, otherwise the pauses are really awkward, it seems they messed up the timer between audio clips.

There's a glitch where you fall underneath the map world (I experienced it at least 3 times). You can only reload your last save to fix it, so save frequently. (Or have a lucky auto-save).

Main story: 25 hours, level 37.

Main story + side quests + True Ending post credits: 45 hours, level 47.

Completionist: I'm estimating close to 200 hours here, there's a guy in this Chinese forum that did it and he said it took him nearly 3 months. Monsters don't give very much experience, and you have to get a character to lvl 99. One of the achievements requires at least 100 hours of gameplay.

Have 328/329 items in your "Dictionary". Talk to the man in the black mask (named T.H.M.) by the giant 8 bit statue with the word "謎" (mystery) on his face. If you have <328, he'll tell you to reach level 999 collect all the items in the world. If you have 328, he'll feel sorry for you and give you the Xuan Yuan Sword.

You can only do this on your 2nd playthrough, because around 50 items or so are not obtainable until you go past the point of no return on the 1st playthrough, and DOMO studio is only accessible before the point of no return.

You also need the Xuan Yuan Sword to fight Zheli Chiyou, to complete the bosses achievement.

Chiyou shows up in the blood path after you finish blood path storyline. He'll be a red dot on the map as a map boss, with around 250K hp, and damage return. Using the easy battle method this fight will be a piece of cake (though boring).

To fight Zhile Chiyou, on your 2nd playthrough, carry the Xuan Yuan sword but don't equip it. This triggers the special fight, he's got 450K HP so good luck.

For you masochists grinding the cheevo, if you use "More Teature" on the blood path pigs/big eye frog, if there's a big eye frog in the fight, you'll receive a "Mysterious Fruit" drop, that gives 10000 exp.

Otherwise, it's Huaxu tunnels which also gives around 8K exp per fight.

Worked perfectly using SCPToolkit.

Fire!Fire!!Fire!!!
You have to set the barbarian tribe camp on fire without being detected on your first try during the "stealth mode" sequence. If you are detected, the sequence restarts and you lose the ability to get the achievement. Just load your last save instead.

Treasure Hunter
During the flooded bridges sequence, you have to complete the saves in a specific order (see the walkthrough guide https://sp.zhabite.com/sharedfiles/filedetails/?id=641207662 under Loess River Valley quest). Otherwise you can't get all the treasure boxes, and can't get this achievement.