談天說地

to talk endlessly / talking of anything under the sun

to talk endlessly; to talk about everything under the sun

day / sky / heaven

-ly / structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct

earth / ground / field / place / land / CL:片[pian4]

surname Tan

to speak / to talk / to converse / to chat / to discuss

to chat

to persuade

to speak / to say / to explain / to scold / to tell off / a theory (typically the last character in a compound, as in 日心說|日心说 heliocentric theory)

to speak; to talk; to say / to explain; to comment / to scold; to tell off / (bound form) theory; doctrine