40:48 Okay, Zoe. This is, Harvey. I'll take the first one regarding gross margin. In 2021, our year-over-year gross margin growth has reached a 126%, and especially in Q4 the margin growth rate is 133% Y-o-Y, which is 3.8 times of our revenue growth rate. In our previous quarter's earnings call, we did mention that we will be very concentrated in growing our margin dollars and we delivered that with B2B margin growing 3.8 times as fast as our revenue grows. So first of all, direct sourcing from pharmaceutical companies has been highly effective in lowering the cost of the product. We have currently direct sourcing from 515 in the national and domestic pharmaceutical companies. These provides us with much wider selection, the lower cost to enable our downstream pharmacies to better serve their customers. 42:14 Secondly, our digital platform creates tremendous value by matching downstream demand with upstream supply. For our pharmaceutical partners, we are able to provide information gathering from our 385,000 pharmacies, such as likely profile of customers for certain drugs, including location, the quantity, pricing, which is invaluable to our upstream pharmaceutical company, to help them make decisions based on customer habit and needs. 43:04 Thirdly, very important driver on our margin improvement is through optimization of our product assortment and structure. With our current volume which has exceeded RMB10 billion, we are in a position to balance our portfolio of products with high velocity SKUs, low traffic driver, which may have low margin profile. But together with other products with higher margin profile, we currently have over 5,000 SKUs with very healthy margin profile. And not only do we make more profit from these SKUs, but also they will help our pharmacy customers to improve their gross margin. 44:01 And last, but not least, our technology and tools also contribute a lot to improve efficiency of our margin management. For example, our price intelligence system, our SSS, Smart Sourcing System, Smart Replenishment Systems, et cetera. And moving forward, we definitely can see our margin growth rate in the next quarter should be much faster, faster than our revenue growth rate. And our B2B business should be getting more and more healthy. Thank you.