我自己找到答案了，是你用自动拍照的模式，然后移了位置， 恩，应该是这样的。

不是应该有六个人吗？因为有一个人拿着照相机呢？为什么只有5个杯子，5套餐具？

It reminds me of my happy time with my American friends :-)

I saw the fifth glass. 

yeah, i checked another photo of this dinner from a different angle, the fifth cup was sheltered
 from one candle, and the red wine left inside was also much less than the other 4, so ....

I'm wondering why there are only four cups on the table:)