Objective To understand the growth development status for preschool children in Guangxi, and to provide basis for the further interventions.
目的了解广西学龄前儿童生长发育状况，为进一步改善学龄前儿童水平提供科学依据。
Objective to understand the growth development status for preschool children in Guangdong province, and to provide basis for the further interventions.
目的了解广东省学龄前儿童生长发育状况，为进一步改善学龄前儿童生长发育水平提供科学依据。
Objective To understand growth and development status, diseases, intelligence development status of rural children in Hunan.
目的了解湖南农村儿童生长发育、疾病和智力发育状况及其影响因素。
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