Thanks, Rene. Good morning, and good evening, everyone. Welcome to Aurora Mobile's 2022 Fourth Quarter Earnings Call. Before I comment on our Q4 results, I would like to remind everyone that the quarterly earnings deck is available on our IR website. You may refer to the deck as we proceed with the call today. Before looking at the fourth quarter, I would like to reflect upon our journey in the past couple of years in a challenging environment caused by pandemic, what we did right, what we learned, how we came from the toughest time, and how much we can grow as an organization. I'm proud to say that we came out of the difficult times and became more resilient and efficient. Along the way, we have been constantly reviewing our overall strategy, not afraid of making necessary decisions no matter how tough to ensure we are always on the right track to long-term growth. Throughout this effort, our revenues and margins remained strong as we improved gross profit, while tightly controlling and lowering or pass. We started a fresh as a pure SAAS business in Q1 2021, a major transition period, we didn't stop innovating and harnessing our core business line, Developer Services. This really is bringing us rewards for the long run. I will give you more details later with economic uncertainty going globally. In mid-2021, we acted quickly and proactively to make our organization stronger and nimbler by enacting restructuring and strict cost management across the company. We're also glad we made these decisions, and our efforts are reflected in our financial results. Let me share some of the key results with you. Second positive adjusted EBITDA since 2021 Q4 at RMB 0.6 million. All business, including Developer Services, Subscription, Value-add Services and Vertical Applications have record Q-o-Q growth. Highest gross profit in 2022 at RMB 59.8 million. Lowest adjusted operating expenses since IPO for the past 18 quarters at RMB 52.8 million. Lowest adjusted net loss since Q3 of 2019 at RMB 6.6 million, improved by 18% year-over-year. AR turnover days at 32 days lowest since IPO. Deferred revenue balance is the highest in the history of the company at RMB 142.4 million. Total customer number up 70% year-over-year to 4,719. I am thrilled to report revenue growth in Q4 2022. Total revenue rose to RMB 86.9 million, up 8% quarter-over-quarter, and both Developer Services, our core business and vertical applications have achieved sequential growth with the biggest revenue growth contribution by Developer Services at 11%. In this quarter, we recorded the highest quarterly revenue of 2022 and lowered our adjusted OpEx bringing the cash component of OpEx to a historically low level. With that, our adjusted EBITDA was positive for the second quarter since Q4 2021 at RMB 0.6 million, significantly improved by RMB 7.3 million from negative RMB 6.7 million in Q3 2022. Our adjusted net loss was also the lowest -- the lowest since Q3 2019 at RMB 6.6 million improved by 18% year-over-year. Furthermore, we ended this quarter on a higher note with more than RMB 142 million in total deferred revenue our remaining performance obligations up 15% versus last year. This is a set of impressive financial numbers for Q4 2022 that our team has worked hard to achieve. And it showed that we are running the business well. I sincerely believe more good things will come. We are confident that the end of the COVID 0 policy in December 2022 marks the beginning of China's emergence from the pandemic. Even though there may be some short-term hearings, this, we believe, has put the country on a path to return people's life to normalcy and resume pre-COVID levels of consumer, social and economic growth. Therefore, the outlook for renewed consumer activities and a gradual recovery of our business in 2023 is very promising. Now let me go through our different revenue streams. Developer Service revenue increased 11% quarter-over-quarter to RMB 63.2 million, which was mainly due to the increase in both Subscription Services and Value-added Services. Year-over-year, Developer Services revenue decreased by 1.5%, mainly due to the weakness in Value-added Services, offset by the growth in Subscription Services. Subscription Services revenue were RMB 46.3 million, up 11% quarter-over-quarter and up 4% year-over-year. Subscription services, our core business line includes JPUSH, Analytics, UMS and other products and services that help App developers and enterprises to improve operational efficiency. Our private cloud service revenue increase has contributed to the Subscription revenue growth, and we were able to bring a number of renowned customers on board, including but not limited to [Indiscernible]. The increase in ARPU also contributed to the growth in revenue, and we managed to grow our customer base with several well-known and sizable customers like IPA, [Indiscernible], and J&T Express, just to name a few. Since the launch of the overseas service platform EngageLab in October we have seen encouraging trends and customers have been expressing their strong interest in our products. We are expecting stronger revenue growth going into 2023, and we will continue to improve our products and services to help global developers with higher efficiency and cost-effective user reach. As I mentioned earlier, we are anticipating consumer activities to recover further in 2023. During Q4, we already saw some growth in our value-added services revenue which is a good indicator of overall reviving consumer activities. The value-added services revenue increased quarter-over-quarter by 10%, and it was the first quarter-over-quarter growth in 2022, a major positive sign for us. Year-over-year revenue was down 44% to RMB 16.9 million, and we expect the year-over-year growth trend will continue to recover in 2023. Major customers of the JG Alliance services consisted of repeated customer and market leaders across many industry verticals. Key customers include BAT, Baidu, Alibaba, Tencent, Xiaoshan Bank and Juhu. For our Adpub that was launched back in Q2 2022, we are seeing more and more interest from various apps over 10 million DAUs joined our platform by the end of this quarter. Growth in DAUs of over 300%. And as the overall economy recovers in China, we believe that more DAUs will join our platform going forward. Another exciting news, which also marks a major milestone for us. It's our pioneer work in integrating the ChatGPT technology in our JPush, our push notification solution and in our e-mail and SMS service platform. Today, AI has become the cornerstone of many products and services, and it is very important for us to be one of the first movers in applying AI technology. Our proactive integration of interactive language model technology and AIGC really give us the edge and a great opportunity to make our products smarter further benefiting all our customers. For a long time, a critical concern of developers has been how to attract users' attention for creative high-quality push content and information click-rate and user conversion. The AI creation to resulting from the integration of ChatGPT into JPush delivers a powerful solution. Using these 2 developers can quickly tap into the AIGC generating a personalized intelligent push content to achieve high click-through rate and high conversion, effectively improving the efficiency of user reach and engagement. And for our e-mail service, integrating ChatGPT will enable customers to generate AIGC personalized e-mail content according to the recipient information profile and preference. The upgraded e-mail services will not only improve the readily and attractiveness of e-mails, but also increase the response rate and conversion rate of e-mail thereby helping our customers interact with their target users more effectively and achieve higher marketing success. Furthermore, earlier last month, we became one of the first ecosystem partner of ERNIE Bot, a generative AI chatbot developed by Baidu. We will assess ERNIE Bot and apply Baidu's leading intelligent dialogue technology in our customer engagement and marketing technology surfaces. This initiative is an additional step in our implementation of our AI-driven strategy with the support and empowerment of leading AI chatbot technology. As an ecosystem partner we will be given priority for internal testing with ERNIE Bot and we will integrate ERNIE Bot in our products. Many of renowned companies has joined our new broad ecosystem, including [Indiscernible] Automobile, Xiaodu, High Enterprise Solution, India, [Indiscernible] and PC Auto. It's clear that going forward, our businesses are getting ready for this new mega AI trend. We will also carry out in-depth research and development in ChatGPT-related technology, realize interactive dialogue similar to real people for ChatGPT technology and further improve the richness of our push message, e-mail and SMS content to empower the great conversion rate and marketing engagement. With that, I will now pass the call over to Shan-Nen, who will share more information about the vertical application and other aspects of our performance.