 The phase two of product management is building the MVP. So in this phase, product managers need to work very closely with engineers and designers, cross-functional teams such as legal, many different departments that is to build this MVP that meet the customer's needs. In this process, product managers should already retain the requirements and user stories. And then he or she will work with the entire engineering team to prioritize the user stories and also communicate with all the teams. At the same time, product managers will also attend the air gel scrum process. So we have daily send-off, retrospective. There's a very long process of using air gel to launch a product.