China's top education authorities on Friday gave detailed suggestions on when students should go to bed to ensure sufficient sleep amid ongoing efforts to reduce students' burden.

  周五，中国教育部就学生应该何时就寝给出了详细建议，以确保充足睡眠，努力减轻学生的负担。

  Generally speaking, primary school students should go to bed before 9:20 pm, middle school students before 10 pm and high school students before 11 pm, Lyu Yugang, director of the ministry's department of basic education, said at a news conference.

  教育部基础教育司司长吕玉刚在新闻发布会上说，一般来说，小学生应该在晚上9:20前就寝，初中生应该在晚上10点前就寝，高中生应该在晚上11点前就寝。

  "If the students have tried hard but still could not finish homework by that time, parents can just ask them to go to bed to ensure their sleep time," he said.

  他说:“如果学生们已经很努力了，但仍然不能在那个时候完成作业，家长可以让他们上床睡觉，以确保他们的睡眠时间。”

  Schools should control the amount of homework assigned to students to make sure primary school students can finish all written homework at school and secondary school students can finish most of the homework on campus, Lyu reiterated.

  吕玉刚强调，学校应该控制学生的家庭作业数量，确保小学生可以在校内完成所有的书面作业，中学生可以在校内完成大部分作业。

  According to ministry requirement, primary school students should enjoy at least 10 hours of sleep every day, middle school students nine hours and high school students eight hours.

  根据教育部的要求，小学生每天应至少睡10个小时，初中生至少睡9个小时，高中生至少睡8个小时。

  Primary schools should start classes no earlier than 8:20 am and secondary schools no earlier than 8 am.

  小学上课时间不应早于8点20分，中学上课时间不应早于8点。

  Schools should not require students to come to school early for group study and they should ensure a certain amount of nap time for students, he said.

  他说，学校不应要求学生早到学校进行小组学习，应确保学生达到规定的睡眠时间。