Authorities in Singapore have sentenced a Chinese immigrant bus driver to six weeks in prison for his involvement in the city-state's first labor strike in more than a quarter of a century.

38-year-old Bao Feng Shan received his jail sentence Monday. He is one of five bus drivers charged for their involvement in the strike.

The other four are scheduled to appear in court Thursday. If convicted, they could be jailed for up to a year and fined nearly $2,000.

On Sunday, authorities deported 29 other drivers after revoking their work permits.

A total of 171 Chinese bus drivers participated on the first day of the strike last Monday over a salary dispute. The number of drivers taking part in the strike fell to 88 on the second day.

Strikes are illegal in Singapore for workers in “essential services,” such as transportation, unless they give two weeks prior notice. The last labor strike was in 1986.