包打天下

1. • to run everything (idiom) to monopolize the whole business
2. • not allow anyone else to have a look in

Character by character

• 包(bāo)surname Bao
• 打(dǎ)a semantically light, transitive verb that is combined with various grammatical objects to form compound verbs and verb-object phrases with a diverse range of meanings
• 天(tiān)day
• 下(xià)down