How does Jinsha River Noodle Industry work in three shifts and four shifts?

? There are three shifts a day, each shift lasts 8 hours. ***4 groups of people go to work. Each group of people works one shift, and there is always one group of people who take turns to take rest.

Jinsha River is located in the northwest of Huadian County, Jilin Province. A tributary of the Huifa River. Originating from the southern foot of Changquexi Mountain in Yongji County, it flows through four townships and towns: Badaohezi, Yumuqiaozi, Hengdaohezi and Jinsha. Along the way, there are 13 tributaries including Nadangshi River, Lizi River and Hengdao River, which flow into Huifa River in the west of Fu'an Tun, Jinsha Township.

Jinsha River is located in the northwest of Huadian County, Jilin Province. A tributary of the Huifa River. The total length is 70 kilometers. The average river width is 10 meters, with a gravel river bed. There is a Fumidingzi Hydropower Station built in the middle reaches. The original name was "Qilsa River", which means sand fox in Manchu, and later evolved into Jinsha River.

It originates from the southern foot of Xishan Mountain in Changque County, Yongji County, and flows through four townships and towns: Badaohezi, Yumuqiaozi, Hengdaohezi and Jinsha. Along the way, there are 13 tributaries including Nadangshi River, Lizi River and Hengdao River, which flow into Huifa River in the west of Fu'an Tun, Jinsha Township.