Apart from this, we get two days off once aeach week. Apart from this, we get two days off each week.

The original "two days off once a week" makes sense, but "each week" is more natural.

Even during work timethe workday, there is not necessarily a jobwork to do. Even during the workday, there is not necessarily work to do.

You could also say, "Even during working hours, there is not..." But "workday" sounds more natural.

In China, when people get a job funded by the government finance, they all worked this way for years toand years until they retired. In China, when people get a job funded by the government, they all work this way for years and years until they retire.

AfterWhen getting a similarsuch a job, people usually don't study hard orand stop learning because they have gotten a life long career-t. The job will support them for the rest of their lives. When getting such a job, people usually don't study hard and stop learning because they have got a life long career. The job will support them for the rest of their lives.

But thisI hate that kind of life I hate the most. But I hate that kind of life.

Since hate is already a strong word, you don't need "the most."

I can't getfind joy fromin it. I can't find joy in it.

I think life is too short to waste, we should do meaningful things as much as possible, and o. Only by doing so won't we regreill we have no regrets about our lives when we leave theis world. I think life is too short to waste, we should do meaningful things as much as possible. Only by doing so will we have no regrets about our lives when we leave this world.

Please forgive me for making this two sentences. I am a professional editor, I can't help it :) I also changed "leave the world" to "leave this world" because, for some reason, when people talk about death, they talk about it with "this world" rather than "the world."