How to describe the occupation of tea pickers

Describe the occupation of tea pickers:

Tea pickers are generally lucky and bitter. Some choose to pick by machine, while others choose to pick by hand. Because the picking time is different, early tea can generally be picked in February. Migrant workers have to take baskets to pick them, one bud at a time, and pick them in different seasons. From spring tea to summer tea, spring tea is basically picked by hand, and summer tea is much cheaper, which is more like cutting with a harvester.