Thank you, Mr. Tian, and hello, everyone. From a financial perspective, the first quarter of fiscal 2019 was both a challenging and a rewarding quarter for Four Seasons Education.
On the top line, we achieved year-over-year revenue growth of 25.6% as well as a sequential growth of 28.6% from the fourth quarter of fiscal 2018. That being said, the regulatory environmental change since last December and this February has continued to put pressure on our business. Fully aware of the challenges that we were facing, we carefully managed our operations and adopted a stringent cost control mechanism during the quarter. As a result, we are happy to report a solid bottom-line performance for the quarter with a strong non-GAAP net margin of 21.3%.
Just as importantly, we also concentrated much of our efforts on making adjustments to our business model, trying to making progress in diversifying our program offerings for students in different age groups. These efforts, in return, partially offset some of the regulatory impacts and are reflected by the significant increase in revenue contributed by our kindergarten programs, Chinese programs and middle-school programs.
Apart from the adjustment to our course offerings, we have been prudently making investments in our nationwide learning network expansion and exploring different kinds of educational activities to further enhance our brand recognition in the market. Although these investments and efforts are currently at an early stage and are not generating significant cash flow, we believe they will bring profound benefits to our future development.
Now I would like to walk you through more details our first quarter 2019 financial results. Revenue increased by 25.6% to RMB 86.4 million for the first quarter of fiscal year 2019 from RMB 68.7 million in the same period of last year, primarily due to a tuition increase in standard programs; increase of revenue contribution from the Ivy Programs and the small class for standard programs; development of kindergarten and middle school and the non-math programs; as well as the expansion of physical learning center network, including the contribution from newly acquired business as disclosed in the fourth quarter of fiscal year 2018.
Cost of revenue increased by 74.8% to RMB 38.2 million for the first quarter of fiscal year 2019 from RMB 21.8 million in the same period of last year, primarily attributable to costs associated with the increase in faculty staff count as well as learning centers' rental, utilities and the maintenance and depreciation costs.
Gross profit increased by 2.7% to RMB 48.2 million for the first quarter of fiscal year 2019 from RMB 46.9 million in the same period of last year. Gross margin was 55.8% for the first quarter of fiscal year 2019 compared with 68.2% in the same period of last year. The decrease in gross margin was primarily due to the expansion of new centers and a faculty team, which incurred certain upfront costs as well as the discounts granted to students to promote our middle-school enrollment and non-math programs.
General and administrative expenses increased by 22.3% to RMB 25 million for the first quarter of fiscal year 2019 from RMB 20.4 million in the same period of last year, primarily attributable to increased staff costs of RMB 3.3 million and the increase of share-based compensation expenses of RMB 1.3 million as well as an increase in rental costs associated with the relocation of the company's headquarters.
Sales and marketing expenses increased by 11.1% to RMB 8.1 million for the first quarter of fiscal year 2019 from RMB 7.3 million in the same period last year.
Operating income decreased by 21.2% to RMB 15.1 million for the first quarter of fiscal year 2019 from RMB 19.2 million in the same period of last year. Adjusted operating income, which excludes share-based compensation expenses, decreased by RMB 11.3 million (sic) [ 11.3 %] to RMB 21.1 million for the first quarter of fiscal year 2019 from RMB 23.8 million in the same period of last year.
Net interest income increased by 277.8% to RMB 2.8 million for the first quarter of fiscal year 2019 from RMB 0.7 million in the same period of last year, primarily due to the increase of cash and cash equivalents and efficient cash management.
Income tax expenses increased by 17.9% to RMB 8.1 million for the first quarter of fiscal year 2019 from RMB 6.9 million in the same period of last year.
Other expenses reached RMB 2.2 million for the first quarter of fiscal year 2019 from RMB 0.08 million in the same period of last year, primarily due to an RMB 4.5 million fair value change of our 2-year Pimco fund-line note with 100% minimum redemption level at maturity that the company intends to hold to maturity. Other expenses was partially offset by an RMB 2 million other income received by -- from depository programs.
Net income reached RMB 8 million during the first quarter of fiscal year 2019, down 38.7% from RMB 13 million in the same period of last year. Adjusted net income, which excludes share-based compensation expenses and the fair value change of the company's long-term investment, increased by 4.9% to RMB 18.4 million from RMB 17.6 million in the same period of last year. Adjusted net margin was 21.3% compared with 25.5% in the same period last year.
Basic and diluted net income per ADS attributable to ordinary shareholders was RMB 0.16 and RMB 0.15, respectively, compared with RMB 0.35 and RMB 0.32, respectively, for the same period of last year. Non-GAAP basic and diluted net income per ADS attributable to ordinary shareholders was RMB 0.38 and RMB 0.35, respectively, compared with RMB 0.51 and RMB 0.47, respectively, for the same period of last year.
Cash and cash equivalents. As of May 31, 2018, the company had a cash and cash equivalents of RMB 585.7 million, an increase of 106.3%, compared with RMB 283.9 million as of May 31, 2017, primarily due to net proceeds of RMB 594.6 million from the company's initial IPO -- from the company's initial public offering. The increase was partially offset by an RMB 122.1 million dividend distribution and an investment of RMB 158.2 million in funds for more efficient cash management as well as an RMB 70 million cash payment for the acquisition of a renowned early childhood education provider in Shanghai.
Looking forward, for the first quarter of fiscal 2019, we currently expect to generate revenue in the range of RMB 89 million to RMB 92.9 million, representing year-over-year growth of approximately 15% to 20%. The above outlook is based on current market conditions and reflects the company's preliminary estimates of market operating conditions and customer demand, which are all subject to change.
This concludes our prepared remarks. We will now open the call to questions. Operator, please go ahead.