The exact composition of China's foreign exchange reserves is classified information. In July 2019, China's State Administration of Foreign Exchange announced that at the end of 2014, US dollar assets accounted for 58% of China's total reserves, down from 79% in 2005; adding that its share of US currency assets was lower than the global average of 65% in 2014. Analysts believe the remaining foreign exchange assets are held mostly in Euros, Japanese Yen, and British pounds.
Why is the composition of China's foreign exchange reserves classified information? Is there an advantage of keeping it secret? It says it's a secret then the next sentence said they said what the composition was in 2014, so did they make it a classified information recently?