 The third phase of launching a product is the specific product launch process. And then product managers need to do this GTN, which is go to market strategy and work with sales to understand what is the primary market we need to launch. They also need to train the sales and marketing team. And on top of that, earlier in the customer adoption phase, product managers usually join the customer meetings to do sales, close the sales with customers. So therefore there's a lot of responsibilities in terms of hobby speaking skills and sales skills as well.