David Liu
Analyst · Gregory Zhao of Barclays. Please go ahead
To add on to Colin's comments, so first of all, in terms of users acquisition, as Colin mentioned, related to that it - again, our focus on user engagement, right. In order to make sure that the vast majority of our user base have a good and solid experiences. And more importantly, in terms of trying to drive growth, it's more important that will increase. And the one thing we can do is help induce the increased frequency of the activities on our platform, both in terms of making purchases, but also in terms of having great experience and therefore helping to share and helping to draw in new users. So as we have talked about, our sales and marketing expenses really encapsulate a few different parts, offline advertisement aside, really comes from, both in terms of online user acquisition, but more importantly, on promotional activities and coupons. And as we mentioned before, we evaluate the ROI of these promotions and coupons by looking at the behavior change of our users after they receive the coupon. So for example, we would observe our users time spend, whether they share with their friends and invite new users as well as the AOV, order frequency and product categories purchased. If we observe that some users only purchase when they have a coupon and do not do anything else, then these will be low-value users that do not meet our ROI thresholds for investment. On the other hand, if our - we see our users are responding to a program the way we expected to and are sharing that we would choose to continue those programs above and beyond a certain shopping holidays or festivals. As Colin had mentioned at the last earnings call, Pinduoduo is not a platform designed specifically to have peaks around shopping festivals, but instead we want users to be able to come to our platform all the time and be able to find the best value for money and products. And we believe the spending pattern that we're seeing with our Tier 1 users on our platform over - well over RMB5,000 based on Q3 annualized figure is a good testament to the quality of their experiences and the quality of the user base that we're seeing similar to our larger peers.