Villain is basically unknown. Hero sat down at table about 20 minutes ago and hasn't seen much of note from villain other than he appears to be a standard 40-50 year old asian recreational player. Villain's stack is about 900, Hero has 500.
2 players limp, Villain raises to $20 from button, Hero in BB with AhAd raises to $60, limpers fold, Villain calls.
Flop ($130) QhTh7d
Hero bets $75, Villain calls.
Turn ($280) Jc
Hero bets $125, Villain calls.
River ($530) Qd
Hero ($240 left) ?
What is correct play on the river. Kind of an awkward spot against an unknown.