After the little boy had knocked into Su Jiu and Han Siye had fought with him, Su Shengjing had picked up Su Jiu's cup of fruit juice and drained it in one gulp.
If Qin Feng or someone else were secretly watching him, they would've been distracted by the rash little boy and Han Siye. They would not be able to tell which glass of fruit juice Su Shengjing was holding.
After drinking the fruit juice, Su Shengjing had picked up Su Jiu and carried her to the auction. The little girl wanted to bring the glass of fruit juice with her, but he did not agree to it. She had found it strange.
All of a sudden, Su Shengjing was glad that there were no expensive drinks at this banquet. There was only fruit juice and tea, and the waiter had coincidentally given him and Su Jiu two glasses of the same fruit juice.
Otherwise, he wouldn't have been able to pull this off.
