一山不容二虎

1. • lit. the mountain can't have two tigers (idiom)
2. • fig. this town ain't big enough for the two of us
3. • to be fiercely competitive

     of two rivals

Character by character

• 一(yī)one
• 山(shān)mountain
• 不(bù)no
• 容(róng)hold
• 二(èr)two
• 虎(hǔ)tiger