An original China Rabbit cartridge with a JY ID number.
China Rabbit with a YY ID number. The typo on YY suggests this cover was not made by J.Y., but some local distributor. It uses the exact same board as the J.Y. id release.
This is the Ka Sheng release of China Rabbit Baby. They blatantly copied the Realtec cover, as the K-R6 ID can still be seen.
Copy from the 2000s, when J.Y. stock was being liquidated.