(1) What is the English name for the hotel?
Royal Court Hotel

(2) What is the English name of Ron's character?
K.K.

(3) How many times did Ron and Ella both on the bridge? Describe each
5 Times
First time Ron gave Ella back her cassette.
Second time Ella's brother was selling illegal copies of movies.
Third time Ella saved Ron from getting beaten up.
Fourth time Ron tells Ella that Joe didn't hire someone to kill his dad, but was the uncle.
Fifth time Ella was leaving and Ron sang to her.

(4) How many songs did Ron sing in the series? Describe each
2 times he sang in the series
Ron was drunk and sang the Hacken song at Ella's door.
Ella was leaving and Ron had people play Hacken's song on the bridge and then he started singing.
He also sings the sub song, but I don't know if that counts.

(5) What is the name of the restaurant that made Kenix and Joe together?
Luca

(6) Which year did Ron's father saved Joe's father? (hint: the tree)
1973

(7) How much money is Kenix's son's ransom?
1 million dollars

(8) What is the % of stock John Chiang own?
He owns 5% from his sister, but he gets 45% from Joe when Joe needs money to pay the ransom for his son.

He sings 'Happy Birthday' to his mom at the end. Does that count? I don't remember when else he sang.

He sings the Hacken Lee and Alan Tam song about beer.