Thank you, Yufei. Hello, everyone. Welcome to Sunlands second quarter 2020 conference call. While the COVID-19 pandemic in China was effectively contained during the second quarter due to the varying work resumption requirements in different regions. The average resumption rate of our Wuhan campus and at the headquarters in Beijing was about 80%. Against this backdrop, we are pleased with maintaining steady growth in the second quarter, thanks to our self-developed collaborative online office system, efficient operation management and rigorous execution, we achieved the satisfactory financial results for this quarter. Our net revenues reached RMB 512.5 million in line with our guidance. Additionally, we are proud to say that our more than 8,000 employees in four cities are all safer and sound. Our gross billings achieved year-over-year gross for the first time in five quarters, increasing by 21.3% to RMB 531.5 million compared with the prior year period. In addition, new student enrollments increased by 10.2% year-over-year. The increases were mainly driven by our strategy to diversify product and service offerings, continuous expansion in training course categories, improved efficiency of our sales team, as well as tremendous efforts from all of our employees. Next, let me provide highlights for the period's segment level. Our business mainly focuses on three categories, STE, Master's degree-oriented programs and professional certification skills programs. Our STE programs have maintained a solid market position and market share. And Master's degree-oriented programs have become our strong new growth driver. According to Ministry of Education, the number of applicants for postgraduate programs are expected to reach a record high of 3.41 million, representing an increase of 510,000 or 17.6% year-over-year from 2.9 million in 2019. In response to the strong growth of applicants, the Ministry of Education made an announcement in February to expand the number of admissions in 2020 by 189,000 from last year's level. The ever-expanding number of people taking the postgraduate admission test comes from the rising pressure of employment in China, and the increasing demand for talents with higher education for enterprises. According to China education online, former students, most of the working professionals accounted for 45% of those taking the post graduate admission test in 2018, leveraging our skills and operating experience and the service advantage for this group of people. We're focused on providing the postgraduate admission test preparation for working professionals and have achieved the remarkable results. Our Master's degree-oriented programs have grown year-over-year for eight consecutive quarters. Gross billings of Master's degree-oriented programs for this quarter reached a new high of RMB 135.2 million, up 58.7% year-over-year and accounting for 25.4% of total gross billings. This proportion was significantly higher than 2019 and 2018, during which of a Master's degree-oriented programs accounted for only 17.9% and 5.5% of gross billings, respectively. At the same time based on student demand and the new market strains, Sunlands is also actively expanding our course offerings in multiple categories, including professional certifications and trainings related to new occupations as well as new skills and hobbies training catering to person's diverse interests. The segment reached RMB 59.5 million in gross billings this quarter [38.4%] [ph] year-over-year, accounting for 11.2% of total compared with 6.9% in 2019. We expect continued robust growth for this segment, as its ASP is relatively low at approximately RMB 3,000. And we are in the process of adding more courses for our new and existing students experience on our live streaming, live teaching platform. We are pleased to say that as this new categories of course is much shorter than degree courses, students are [thicker] [ph] and have a higher repurchase rate, which we expect to contribute positively to our profitability improvement. In the future, we will continue to take advantage of STG platform and our teachers raise teaching experience constantly developing more online short-term courses suitable for adults. In order to expand our attractive user base and to promote course settings. Lastly, due to the performance of the national STE exams for April to August, gross billings of STE programs, our largest based segment also increased by 6.8% year-over-year in the second quarter, as both new student enrollments and ASP increased. In the second quarter, our students including those taking trial and free classes showed greater enthusiasm to study during the pandemic period, as we continuously optimize our student teacher system, this system refers to our comprehensive solution that combines live streaming lectures, after class mentors and AI powered personal tutors. In this quarter, total time spent on online classes our learning platform was 22.3 meeting hours, increasing [16.4%] [ph] year-over-year and 25% quarter-over-quarter. The total number of online class attendees rose to 758,000 than the average time spent this quarter for a student who was almost 30 hours. The interesting fact was that of total times spent on live streaming classes during this quarter 35.5 meeting hours or about 24.5% were driven by students spending time on per free trial or free courses, including various new courses and mini tutorials. This was 8 times higher compared to the level in the same period last year, and same time higher versus last quarter. In addition, trail classes' students accounted for 27% of total students attended classes this quarter. Through this trial program, we enable prospective students to experience our course contents and the teaching services in advance, which not only improves the retention rate of new students and expand our potential user pool, but also helps us develop a deeper understanding of student interest and realize additional cost saving potentials. Looking forward, we are confident to maintain the market leading position of our existing service categories and continuously improve the learning effectiveness of our students through technical and operational advancement. We're also optimistic of the market opportunities and the possibilities of course setting as we develop new contents and execute our efficient students acquisition strategy. With that, I would like to hand over the call to our CFO, Selena to run through our financials.