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If you have two ports available, the simplest things would be to get two USB-C-to-DP cables. (Make sure they carry enough bandwidth for your monitors.) If you need one of the ports for charging, you'll can use a dock that has a DP port and a USB-C power pass-though. Amazon is a good place to search, because the reviews usually give a good idea which equipment works best.
 
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What are the adapters I need?

Thank you.
Depending on your usecase and your monitor, you need to figure out if the cable or adapter you're going to buy will be able to deliver 60hz. Some cables are limited to 30hz @4k for instance. Displayport should be able to handle 60hz but I am not sure about alieexpress stuff.
I use a club3d usb c to displayport adapter and a branded dp cable and it works fine with my Dell 2560*1440 monitor @60hz.
Good luck.
 
https://www.startech.com/de/AV/Konverter/Video/Thunderbolt-3-auf-Dual-DisplayPort~TB32DP2

Works fine with my Macbook Pro 13 NTB. You have to enable Thunderbolt 3 support for the used chipset first:

https://egpu.io/forums/mac-setup/is-anyone-successfully-running-an-egpu-with-10-12-3-beta/#post-1639

I am running a Cinema Display 27 LED and a LG 4K display with this adapter. After much trial this works the best, although the necessary hacking (which is really easy and still works with the macOS beta versions) might give a contrary impression at first.

Farb-LCD:
Displaytyp: Integriertes Retina-LCD-Display
Auflösung: 2560 x 1600 Retina
Pixeltiefe: 32-Bit Farbe (ARGB8888)
Synchronisierung: Aus
Eingeschaltet: Ja
Rotation: Unterstützt
Helligkeit automatisch anpassen: Ja
Verbindungstyp: DisplayPort
LG Ultra HD:
Auflösung: 2560 x 1440 @ 60 Hz
Pixeltiefe: 30-Bit Farbe (ARGB2101010)
Hauptdisplay: Ja
Synchronisierung: Aus
Eingeschaltet: Ja
Rotation: Unterstützt
Helligkeit automatisch anpassen: Nein
Verbindungstyp: DisplayPort
LED Cinema Display:
Displaytyp: LCD
Auflösung: 2560 x 1440
Pixeltiefe: 30-Bit Farbe (ARGB2101010)
Synchronisierung: Aus
Eingeschaltet: Ja
Rotation: Unterstützt
Helligkeit automatisch anpassen: Nein
Verbindungstyp: DisplayPort​
 
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