New Curriculum Standards Volume 1:
Provinces used before 20 15: Henan, Hebei, Shanxi, Shaanxi (language and comprehensive), Hubei (comprehensive), Jiangxi (comprehensive) and Hunan (comprehensive)
20 15 provinces with increased usage: Jiangxi (Chinese, Mathematics, English) and Shandong (English)
20 16 Increased use of provinces: Hubei (Chinese, Mathematics and English), Guangdong, Shaanxi (Mathematics), Fujian and Anhui.
, Shandong (comprehensive)
New Curriculum Standards Volume II
Guizhou Gansu Guangxi Qinghai Tibet Heilongjiang Jilin Ningxia Inner Mongolia Xinjiang Yunnan Liaoning (Comprehensive) Hainan (Chinese Mathematical English)
20 15 Add province: Liaoning (Chinese, Mathematics, English)
20 16 new provinces: Chongqing and Sichuan.