See the  "Expose Copper" attribute in: [https://docs.easyeda.com/en/PCB/Route/index.html#Some-Tips-about-Track](https://docs.easyeda.com/en/PCB/Route/index.html#Some-Tips-about-Track)<br> <br> The choice of how the exposed copper is plated is an option that is selected when the Gerbers are submitted for manufacture. The three plating options available from JLCPCB are: HASL (Hot Air Solder Levelled) Lead Free HASL ENIG (Electroless Nickel Immersion Gold) [https://jlcpcb.com/quote/pcbOrderFaq/PCB%20Surface%20Finish](https://jlcpcb.com/quote/pcbOrderFaq/PCB%20Surface%20Finish)

@andyfierman Thank you so much for the detailed answer. This makes sense a lot.