Thank you, Zhong Sheng. I will answer the first question, and then the second question, I'll answer together with Jiandong. You're right. I do think that the market is quite dynamic now with some, I would say, entities that exit the market. We also see remaining players are improving in terms of the methods that they operate. At the same time, we also feel as an attractive market, there are new entrants. So for some new entrants, they rely on the so-called AI courses through app. And I do think this is a sort of a replacement of what we call the Disney-like [Foreign Language] type of learning. The -- I would say it's not really educational product per se. I'm sure they will improve continuously to achieve some educational goals. So right now, what I can see is their customer base are somewhat different from our off-line customer base. The evidence is one that we do see very strong growth in terms of number of inquiries into our off-line learning centers. In fact, for Shenzhen and Shijiazhuang, for example, even at June, the new student enrollment already surpassed what they had in same period of 2019. And in July, we actually see Shanghai adding into that list to actually surpass the enrollment number vis-à-vis 2019. So there is a very strong momentum in most of the cities that we operate. That's number one. Number two, even for RISE, we have our online offerings through dual-teacher small group classes, and we are developing AI-related courses as well but mostly as -- attract traffic. Therefore, later on we can convert them into more learning-related programs like the dual-class small group classes or the off-line regular courses. So I think the market definitely is still expanding and growing, and there's a different market segmentation. People sometimes subscribe to more than one program. They think the off-line deliver different learning experience, and then online, they have supplement to off-line. So yes, it is dynamic, but we do see our market growing both off-line and online. So on the OpEx, as you can see that for the second quarter, we actually control our customer acquisition costs really well. Part of the reason is that we have the off-line network so that we can generate referrals and help the customer acquisition. In fact, the CAC number this quarter compared with same time of last year basically is flat. And for third quarter and fourth quarter, sales and marketing costs or expenses will definitely go up because we do think with the off-line practice resumed nationwide, we have a very strong demand. Therefore, we also wanted to improve the new student enrollment significantly. So on the absolute number, it will be quite significantly improved -- increased. But at the CAC level, we hope that we can still control at a reasonable level. And Jiandong, you can supplement.