February 27th to March 2nd. According to official website, Du 'an Education Bureau and Du 'an No.4 Middle School enrolled students from February 27th to March 2nd. Generally, senior high schools announce the admission list on February 27th-March 2nd and July 9th-10. The fourth senior middle school project in Du 'an Yao Autonomous County is a key project in Hechi City and one of the key projects promoted by the Autonomous County.