18 class. According to official website, the government of Wenjiang District of Chengdu, the strong basic class of Guancheng Experimental School in Wenjiang District of Chengdu is one of the characteristic classes of the school, which is mainly divided into 18 classes, mainly for outstanding students in primary schools, junior high schools and senior high schools. The basic classes of Guancheng Experimental School are divided into three subjects: Chinese, Mathematics and English. The basic classes of junior high school are divided into six subjects: Chinese, Mathematics, English, Physics, Chemistry and Biology. The basic classes of Gao Zhongqiang are divided into nine subjects: Chinese, Mathematics, English, Physics, Chemistry, Biology, History, Geography and Politics. 18 classes.