Joyce, thank you for that question. It's very comprehensive. Let me point out a few things. So first of all, as Lei have mentioned in his remarks, we see Duo Duo Maicai really as a natural extension of our e-commerce model and our emphasis on agriculture. What we have seen is that, as the country emerged from COVID-19, consumers behaviors are changing, and how they are looking to address their needs for daily groceries are evolving. And what we have seen is that, users are now increasingly looking to be able to buy more things online. They are trying to identify an alternative venue to wet market and supermarkets and they want their deliver time to be quick, so next day. And also, again, continue to be great value. So, looking at this equation and looking at the use cases that PDD's e-commerce platform addresses on a stand-alone basis, we recognized that there are certain deficiencies. For example, the next day kind of logistic delivery isn't something that PDD's platform to date have been optimized for. So, the extension to Duo Duo Maicai for us is very natural. We can't really comment on other players' decision to enter into similar businesses. And whether they are more likely -- more like a community purchase or not. But from our perspective, what we see in Duo Duo Maicai is really addressing this different way of engaging with consumers, fulfilling that different type of usage patterns and needs. And again, you are right to point out that we do think this will require a much better infrastructure tailored specifically for their agricultural produce -- agricultural products. So we are prepared to go heavy in building, we're accelerating the development that this agriculture infrastructure. Today, what we have been doing is investing in people, so we have teams on the ground working with third-party services provider today. But in some instances, we have been got them involved in establishing the SOPs for the warehouses to getting involve in the workflows. We have already invested in warehouse and fleet management systems and we are looking for ways to continue to optimize that, leveraging the technology platform we have from our e-commerce platform. But specifically, though, we do think that there will be scenarios where we will need to make certain investments in order to facilitate development of that infrastructure, including potentially a build-out, but more localized coaching operation that is demand-driven, and therefore, can be most cost-efficient. We are looking to leverage existing services provider to do this, but in some instances, we may need to develop and test cases and do it ourselves. Let me pause there and let Tony address the question regarding sales and marketing on Duo Duo Maicai.