Hi sakairiyoshimasa,
Welcome to EasyEDA.
A wire in a schematic is called a net.
net
In the text description of a circuit, which is called the netlist, a 'net' is the list of all the things that are connected together by a wire.
netlist
Find out more in All simulation schematics MUST have a ground 01.
in the Spice Tutorials folder:
:)
xxxxxxxxxx
Brand new interactions and interfaces.
Smooth support for design sizes of over 3W
devices or 10W pads.
More rigorous design constraints, more
standardized processes
For enterprises, more professional users.
Easy to use and quick to get started.
The process supports design scales of 300
devices or 1000 pads.
Supports simple circuit simulation.
For students, teachers, creators.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Hi sakairiyoshimasa,
Welcome to EasyEDA.
A wire in a schematic is called a
net.In the text description of a circuit, which is called the
netlist, a 'net' is the list of all the things that are connected together by a wire.Find out more in All simulation schematics MUST have a ground 01.
in the Spice Tutorials folder:
:)