Okay. Thanks, Lillian. This is Andy. Let me take a crack at this and then maybe if Joey have more additional add, that a little bit more later. In terms of delivery, I think it's - I don't know if it's fair to say the delivery margin is dilutive to the overall corporation. As we mentioned before, like we generally look at the restaurant operation holistically, right? So we have multiple ways of delivering the product to our customer, i.e., right, takeaway and delivery. Now it's important to look at, obviously, the restaurant margin for us, because food is unlike e-commerce, right? E-commerce, you don't need - you just need warehouse and you can distribute it to the consumer. Food you need to deliver to consumer at a certain time, right, to ensure quality of the food and then customer satisfaction. So having a production or restaurant location is almost a must. For us, if you look at the delivery, delivery has been growing very rapidly. I think we believe that - that's incremental to our overall sales. And then the other part is that, if you look at overall restaurant margin, for example, for KFC before the pandemic, it was largely bit stable, right? So it's about 18% in 2017, '18, '19. And then we are back to a similar level in the first quarter this year. So all through this period, obviously, delivery has been increasing. As I mentioned before, about - delivery was about 11% of our sales in 2017, and now it's about 30% plus, right? So we're able to maintain that margin. Obviously, it's hard work. There's a lot of work [ph] going through it. But it hasn't been particular dilutive to us. The other one is that if you look at, for example, the labor cost expenditure, for example, for KFC, like, for example, it has been also largely stable despite also, we continue to see wage inflation in China at - before pandemic to high single digit level, right? So if you look at KFC's cost of labor, which including the bio [ph] cost there was about 20% - 20%, 21%. It's stable in 2018 and '19, both markets is being is probably '21, '20, or 21%, right? So - and then in this year, we had about 22%. So overall I think as Joey mentioned, it's not necessarily dilutive for us. If these incremental sales come bring in by delivery, we actually have higher margin because the marginal contribution from additional sales is actually pretty high.