Hi,
in "Export Schematic BOM" | "Assign LCSC Part#", when I enter resistor with part number C916018 (https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Firstohm-First-Resistor-Condenser-MM52F270KTKRTR2K0_C916018.html)
I get "Not Found !" but when I select "search on lcsc.com" the part is found and the above url opens.
Conversely when I pick a part (C365129) from within the dialog and click on the part number link (to the left of "Stock") the part is not found on https://lcsc.com !
BTW, the same happens if I try using the manufacturer's number, so the part can not be found/used in easyeda.
Obviously EDA lookups are not performed against the lcsc.com database.
Why is a different db used?
As it is, the system is unusable!
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Hi
Not all parts can be assigned at BOM dialog, at present it is need to be drawed at EasyEDA
we are consider to support to change the assign engine to LCSC in the future