Simplify the following text for a Grade 6 native English-speaking person.
Original: The Baiji ( Lipotes vexillifer , Lipotes meaning `` left behind '' , vexillifer `` flag bearer '' ) was a freshwater dolphin found only in the Yangtze River in China .
Simplified: The Baiji ( Chinese : ç 1\/2 é è ; pinyin : bÃ ijÃ tÃ n ) called also Chinese River Dolphin ( Lipotes vexillifer ) is a river dolphin . It wass found only in the Yangtze River in China .