勤快 (qín kuai): diligent; hardworking

She gets up every day before dawn, first sweeps the yard, and then makes breakfast for the whole family; the neighbors all praise her as especially diligent.

The owner of this small restaurant is very diligent and always goes to the market himself to pick the freshest vegetables, so business has always been especially good.

At the start of the semester, he set a plan for himself: review for two hours every day and go to the library on weekends. Being so diligent, no wonder his grades improved so quickly.

To make the flowers in the garden bloom better, Grandpa waters and loosens the soil every day, and even on rainy days he still goes to take a look. He really is the most diligent person in our family.