Children must start school by age six, but many go to preschool at age four.
从6岁起儿童必须接受学校教育，但很多孩子在4岁起就开始上学前班。
youdao
Do you have a preschool age child who has been exposed to Mandarin at home?
您家有对中文有接触的幼儿吗？
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