Error message:
UnicodeEncodeError: 'ascii' codec can't encode characters in position 345-350: ordinal not in range(128)
[spawn_model-3] process has died [pid 5767, exit code 1, cmd /opt/ros/melodic/lib/gazebo_ros/spawn_model -urdf -model car -param robot_description __name:=spawn_model __log:=/home/ren/.ros/log/7bb0d8dc-e373-11ed-a35d-0c9d921065ef/spawn_model-3.log].
log file: /home/ren/.ros/log/7bb0d8dc-e373-11ed-a35d-0c9d921065ef/spawn_model-3*.log
If the ros used is the melodic version, just delete all the Chinese comments in the urdf file