There will be a big event in Genshin Impact that allow you to make a treasure hunter, which is the Moonlight Seeker event. It is difficut for you to reach the 100% collection progess however, here is an useful guide to help you get them more easier!
 
Genshin Impact Moonlight Seeker: How to start the event
You need to be Adventure Rank 28 (or above) and have completed 'Chapter 1: Act 3 - A new Star Approaches' and 'Trulla Chapter: Act 1 - Mondstadt Gastronomy Trip' to access the quest needed to unlock the challenge. With both of those quests under your belt, proceed with 'Moonlight Merriment: Part 1' and 'The Many Matters of the Moonchase Festival', and you can then speak to Linyang in Liyue Harbor to get started.

 
 

Moonlight Seeker Rewards
25% Progress
·Lustrous Stone from Guyun x4
·Mora x20,000
·Moonchase Festive Fever x50
 
50% Progress
·Mist Veiled Mercury Elixir x4
·Mora x20,000
·Moonchase Festive Fever x50
 
75% Progress
·Piece of Aerosiderite x4
·Mora x20,000
·Moonchase Festive Fever x50
 
100% Progress
·Luxurious Sea-Lord x1
·Mora x20,000
·Moonchase Festive Fever x50
 
How to Reach 100% Collection Progress in Moonlight Seeker
There are a total of 30 Moonchase Charms and 40 Mystmoon Chests in Minlin, Liyue. Linyang will give you hints where they can be found. In the screenshot gallery below, we have marked the locations on both Charms and Chests in two separate screenshots. This area can be found in a canyon between Mt. Hulao and Qingyun Peak. All of the Charms and Chests for this path are located there. Be careful around Mystmoon Chests. When you approach them, some of these Chests will spawn in enemies, and will remain locked until you have defeated them. Once you have done so, you will then be able to open and loot them. Besides the usual assortment of rewards found inside, each chest will always contain Primogems as well. Some of the Moonchase Charms and Mystmoon Chests are in plain sight, while others are a bit more hidden. Charms, especially, can be high in the air. When you get to one of the places we’ve marked in the screenshots, take a good look around until you have found them.
 
As well as Mora, Primogems, and other goodies, you'll be able to snag the Genshin Impact Luxurious Sea-Lord claymore for getting 100% completion during Path of the Stalwart Stone section of Moonlight Seeker. If you want to get these treasures, get ready to take part in this event! And by the way, if you need Genshin Impact Accounts, Crystals, Boosting service, 5-star characters and weapons, 5mmo.com is the best place for you to get them!