Kyrgyz was originally written in Turkic runes, gradually replaced by the Perso-Arabic alphabet (in use until 1928 in the USSR, still in use in China). Between 1928 and 1940 a Latin-script alphabet, the Uniform Turkic Alphabet, was used. In 1940, Soviet authorities replaced the Latin script with the Cyrillic alphabet for all Turkic countries. When Kyrgyzstan became independent following the Soviet Union's collapse in 1991, a plan to adopt the Latin alphabet became popular. Although the plan has not been implemented, it remains in occasional discussion.