I know those weren't 'acting' tears, they were real tears. It works, and it brought tears to my eyes. Michelle had to cry in every take, for five hours. At the end she was drained. Lee drove Yeoh nearly to tears with his insistence on precise Mandarin speech.
Every single word needs the right intonation.
But it builds character. If you don't listen to Ang, then you're gonna do it again and again, so you'd better listen up. The first day I had to do 28 takes just because of the language. That's never happened before in my life. It gave me a lot pressure.