During the latter part of the 20th century, owing more to wider social, cultural and political changes than the narrow fact of greater access to hanzi literacy, younger girls and women stopped learning Nüshu, and it began falling into disuse, as older users died. The script was suppressed by the Japanese during their invasion of China in the 1930s-40s, because they feared that the Chinese could use it to send secret messages., and also during China's Cultural Revolution (1966–76). The last original writers of the script died in the 1990s (the last one in 2004).