Thank you, Nancy. Now I would like to take you through the fourth quarter and full year of 2021 financial highlights. Total net revenues increased by 0.8% to RMB655.3 million in the fourth quarter of 2021 from RMB650.3 million in the same period of 2020. Net revenue from childhood & adolescent quality education business increased by 12.8% to RMB336 million in the fourth quarter of 2021 from RMB297.8 -- RMB297.9 million in the same period of 2020. The increase was primarily due to increase in student enrollments from 128,300 in the fourth quarter of 2020 to 151,300 in the same period of 2021. Net revenue from adult professional education business decreased by 9.4% to RMB319.3 million in the fourth quarter of 2021 from RMB352.4 million in the same period of 2020. The decrease was primarily due to decrease in student enrollments from 35,100 in the fourth quarter of 2020 to 30,200 in the same period of this year. Cost of revenues increased by 12.4% to RMB327.7 million in the fourth quarter of 2021 from RMB291.5 million in the same period of 2020. The increase was primarily due to increase in personnel-related costs resulting from the growing number of teaching staff at our childhood & adolescent quality education learning centers. The increase in social security fees which will exempt according to the preferential policies and added by the government during COVID-19 pandemic in the fourth quarter of 2020, but were not exempt in the fourth quarter of 2021. Gross profit decreased by 8.7% to RMB327.6 million in the fourth quarter of 2021 from RMB358.8 million in the same period of 2020. Gross margin, which is equal to gross profit divided by net revenues was 50% in the fourth quarter of 2021 compared to 55.2% in the same period of 2020. The decrease in gross margin was primarily attributable to the increase in total cost of revenues, awaiting the increase in total net revenue in the fourth quarter of 2021. Total operating expenses decreased by 12.6% to RMB388 million in the fourth quarter of 2021 from RMB443.9 million in the same period of 2020. Total non-GAAP operating expenses, which excluded share-based compensation expenses, decreased by 12.1% to RMB383.6 million in the fourth quarter of 2021 from RMB436.4 million in the same period of 2020. Total share-based compensation expenses are located to the related operating expenses decreased by 41.3% to RMB4.4 million in the fourth quarter of 2021 and RMB7.5 million in the same period of 2020. Selling and marketing expenses decreased by 0.7% to RMB221.8 million in the fourth quarter of 2021 from RMB223.3 million in the same period of 2020. The decrease was mainly due to a decrease in personnel-related costs, resulting from a drop in the number of sales staffs, which was partially offset by the increase in sales promotion fee in the fourth quarter of 2021 as compared to the same period of 2020. General and administrative expenses decreased by 32.2% to RMB132.5 million in the fourth quarter of 2021 from RMB195.3 million in the same period of 2020. The decrease was mainly due to decreased investment related costs as a result of decrease in the number of staff and one-off income recognized resulting from the receipt of the settlement payment from the Buyer Group Parties of the proposed privatization transaction in the fourth quarter of 2021. Research and development expenses increased by 33.3% to RMB33.7 million in the fourth quarter of 2021 from RMB25.2 million in the same period of 2020. The increase was mainly due to an increase in personnel-related costs in the fourth quarter of 2021. Operating loss was RMB60.4 million in the fourth quarter of 2021 compared to operating loss of RMB85.1 million in the same period of 2022 -- of 2020. Non-GAAP operating loss, which excluded share-based compensation expenses was RMB56.5 million in the fourth quarter of 2021 compared to non-GAAP operating loss of RMB77.5 million in the same period of 2020. The Company recorded an income tax expense of RMB125.7 million in the fourth quarter of 2021 compared to income tax expenses of RMB7 million in the same period of 2020. The increase in tax expenses was mainly due to an increase in provision allowance related to the deferred tax assets, which was derived from the unutilized tax loss, as it was more likely than not that the tax loss will not be utilized within the 5 years deduction period. As a result of the foregoing, net loss was RMB182.5 million in the fourth quarter of 2021, compared to net loss of RMB94.7 million in the same period of 2020. Non-GAAP net loss, which excluded share-based compensation expenses, was RMB178.6 million in the fourth quarter of 2021, compared to non-GAAP net loss of RMB87.1 million in the same period of 2020. Loss per ordinary share was RMB3.22 in the fourth quarter of 2021, compared to loss per ordinary share of RMB1.72 in the fourth quarter of 2020. Non-GAAP loss per ordinary share, which excluded share-based compensation expenses, was RMB3.16 in the fourth quarter of 2021, compared to non-GAAP loss per ordinary share of RMB1.58 in the fourth quarter of 2020. Net cash inflow from operating activities in the fourth quarter of 2021 was RMB129.5 million. Capital expenditures in the fourth quarter of 2021 were RMB21.4 million. Now I'm going to take you through the full year of 2021 financial highlights. Net revenues increased by 25.7% to RMB2,386.5 million in 2021 from RMB1,897.9 million in 2020. Net revenue from childhood & adolescent quality education increased by 62.3% from RMB761.8 million in 2020 to RMB1,236.3 million in 2021. The increase was mainly due to increase in student enrollments of childhood & adolescent quality education from 141,600 in 2020 to 178,400 in 2021. Net revenue from adult professional education business increased by 1.2% from RMB1,136.1 million in 2020 to RMB1,150.2 million in 2021. The increase was mainly attributable to increase in unit price of tuition fee, and certificate revenue, whilst partially offset by decrease in student enrollments from 83,400 in 2020 to 72,100 in 2021. Cost of revenues increased by 12.6% to RMB1,201.4 million in 2021, from RMB1,066.8 million in 2020. The increase was mainly due to increase in personnel-related costs resulting from the growing number of teaching staffs and increase in social security fees which were exempted according to the preferential policies enacted by the government during COVID-19 pandemic in 2020, but were not exempted in 2021. Gross profit increased by 42.6% to RMB1,185.1 million in 2021, from RMB831 million in 2020. Gross margin, which is equal to gross profit divided by net revenues, was 49.7% in 2021, compared to 43.8% in 2020. The increase in gross margin was primarily attributable to the increase in total net revenues outweighed the increase in cost of revenues in 2021 and the effective cost controls we have implemented in 2021. Total operating expenses decreased by 5.1% to RMB1,554.2 million in 2021, from RMB1,637.4 million in 2020. Total non-GAAP operating expenses, which excluded share-based compensation expenses, decreased by 4.1% to RMB1,535.2 million in 2021, from RMB1,601.6 million in 2020. Total share-based compensation expenses allocated to the related operating expenses decreased by 46.9% to RMB19 million in 2021, from RMB35.9 million in 2020. Selling and marketing expenses decreased by 3.1% to RMB878.1 million in 2021, from RMB906.3 million in 2020. The decline was mainly due to decrease in advertising expenses in 2021. General and administrative expenses decreased by 9.6% to RMB570 million in 2021, from RMB630.6 million in 2020. The decline was mainly due to decrease in personnel-related cost and welfare as a result of decrease in number of staffs, and the one-off income recognized resulting from the receipt of the settlement payment from the Buyer Group Parties of the proposed privatization transaction in 2021. Research and development expenses increased by 5.6% to RMB106.1 million in 2021, from RMB100.5 million in 2020. The increase was mainly due to the increase in personnel-related costs in 2021. Operating loss was RMB369.1 million in 2021, compared to operating loss of RMB806.4 million in 2020. Non-GAAP operating loss, which excluded share-based compensation expenses, was RMB350 million in 2021, compared to non-GAAP operating loss of RMB770.1 million in 2020. The Company recorded an income tax expense of RMB114.1 million in 2021, compared to income tax benefit of RMB35 million in 2020. The increase in tax expense was mainly due to the increase in provision allowance made to the deferred tax assets which was derived from the unutilized tax loss, as it was more likely than not that the tax loss will not be utilized in the 5 years deduction period. As a result of the foregoing, net loss was RMB475.8 million in 2021, compared to net loss of RMB771.2 million in 2020. Non-GAAP net loss, which excluded share-based compensation expenses, was RMB456.7 million in 2021, compared to non-GAAP net loss of RMB734.9 million in 2020. Loss per ordinary share was RMB8.43 in 2021, compared to loss per ordinary share of RMB14.11 in 2020. Non-GAAP loss per ordinary share, which excluded share-based compensation expenses, was RMB8.10 in 2021, compared to non-GAAP loss per ordinary share of RMB13.44 in 2020. Net cash inflow from operating activities in 2021 was RMB8.6 million. Net cash inflow from investing activities in 2021 was RMB33.7 million. The net proceeds from disposal of properties and long-term investments were RMB94.6 million and the capital expenditures were RMB67.7 million in 2021. In terms of financial guidance, based on our current estimates, total net revenues for the first quarter of 2022 are expected to be in the range of RMB580 million to RMB610 million, which represent an increase of 8.6% to 14.2% as compared to the net revenues in the first quarter of 2021, after taking into consideration the seasonal fluctuation and the likely continued impact of the COVID-19. This guidance is based on the current market conditions and reflects the Company's current and preliminary estimates of the market and operating conditions, which are subject to change, particularly as to the potential impact of COVID-19 on the economy in China and elsewhere in the world. This concludes my financial highlights section. Operator, we are ready for questions. Thank you.