What is the best way to farm LMD?
Arknights Guide
What is the best way to farm LMD (Lungmen Dollars) in Arknights? This currency is one of the most common that's used and you'll be using it primarily to strengthen your operators. Knowing the different ways to obtain LMD is vital since this resource can get used up soon when you promote your Operators and level them up.
Check your Daily Log In bonuses
Whenever you start the game, the daily log in screen should appear and show your rewards. LMD is given out every certain amount of days so make sure to claim them since the amount given out is increased the longer your streak is. 
Complete the Cargo Escort Supplies Missions
The Cargo Escort mission in the Supplies section of combat lets you farm LMD. This section isn't open every day, therefore you can farm on the following days only:* Tuesday
* Thursday
* Saturday
* Sunday
Once you have cleared operations here and get a 3 star completion rating, you can then use Auto Deploy next time to farm automatically. Make sure that your operators are capable of clearing the stage.
Purchase Packs and Exchange Certificates from the Store
There are two tabs that you can access in order to get LMD from the Store, these are the Packs and Certificate section. Different packs are available such as growth packs and starter packs that provide LMD with their bundle. 
On the Certificate section, you can exchange your Qualficiation Certificates for LMD (for a limited amount). Once you have used it all up, the item will be marked as sold out.
Clear Campaign Operations
Clearing campaign operations provide LMD as a fixed amount. If you clear the story mode once, all operations provide fixed LMD. However, it's better to spend your time in a Cargo Escort supplies mission instead since those provide a higher amount. 
Clear your Missions
The Missions system provides you with rewards after completing tasks. Check your Pinboard Missions, Daily, Weekly, and Campaign Missions so you can see the list of rewards given out. Daily and Weekly missions reset accordingly so you can use those to farm LMD. 
Use your Trading Post from the Base
The materials you get from your Factory are then used in the Trading Post. Fill in orders and give Gold Pieces and they'll be converted to LMD in return. Once you upgrade your Trading Post to level 3, you'll be able to choose which orders you get. This is a great place to gain LMD. 
We have questions and answers related to this topic which may also help you: Show all
Paul, also known as 'vhayste' is a top guide writer who has been covering games for us for many years.
You can follow Paul on Twitter