Earlier this week, Apple (NASDAQ:AAPL) announced that its iPhone 6s and 6s Plus had surpassed last year's record-breaking iPhone launch weekend sales, with the new units selling 13 million units in three days compared to 10 million last year. 

But there's one major difference between this year's launch data and last year's: iPhone sales in China were included this time around. You may remember that last year's iPhone launch in China was delayed because the device was awaiting regulatory approval. But Apple didn't have the same problem this year, and that likely helped push up the total iPhone sales number for the weekend.

Click on the video below to find out more about the iPhone's latest sales numbers, and how China will keep contributing to its rise.