He can be sent to jail.
The PRC smrt bus drivers were arrested and jailed for not
reporting to work, remember?
They were charged under the Criminal law temperory privisons act
for illegal strike
Look on the bright side,
better that employee leaves before he casues more destruction or
harm to your parents business. Disgrunted employees might hinder
productivity and cause a fall in quality of goods and service. Some
may even sabotage the business....