The following table sets forth a summary of changes in our working capital from October 31, 2022 to April 30, 2023:
| | | | | | | | | | | | |
| | April 30, | | October 31, | | Changes in | |
| | 2023 | | 2022 | | Amount | | Percentage | |
Working capital: | | | | | | | | | | | | |
Total current assets | | $ | 36,892,085 | | $ | 34,858,624 | | $ | 2,033,461 | | 5.8 | % |
Total current liabilities | | | 2,436,529 | | | 1,494,088 | | | 942,441 | | 63.1 | % |
Working capital | | $ | 34,455,556 | | $ | 33,364,536 | | $ | 1,091,020 | | 3.3 | % |
Our working capital increased by $1,091,020 to $34,455,556 at April 30, 2023 from $33,364,536 at October 31, 2022. The increase in working capital was primarily attributable to a significant increase in cash of approximately $35,921,000 mainly due to proceeds from sale of our short-term investments of approximately $27,615,000 in the six months ended April 30, 2023 and collection of note principal and related interest of $7,800,000 in the six months ended April 30, 2023, offset by a significant decrease in short-term investments of approximately $26,180,000 resulting from sale of our short-term investments in the six months ended April 30, 2023, a significant decrease in note receivable of $7,500,000 driven by our collection of note principal in the six months ended April 30, 2023, a decrease in interest receivable of approximately $262,000 resulting from our collection of note related interest in the six months ended April 30, 2023, an increase in salary payable of approximately $218,000, and an increase in due to related parties of approximately $684,000 driven by expenses paid by our related parties on behalf of us in the six months ended April 30, 2023.
Because the exchange rate conversion is different for the condensed consolidated balance sheets and the unaudited condensed consolidated statements of cash flows, the changes in assets and liabilities reflected on the unaudited condensed consolidated statements of cash flows are not necessarily identical with the comparable changes reflected on the condensed consolidated balance sheets.
Cash Flows for the Six Months Ended April 30, 2023 Compared to the Six Months Ended April 30, 2022
The following summarizes the key components of our cash flows for the six months ended April 30, 2023 and 2022:
| | | | | | |
| | Six Months Ended April 30, |
| | 2023 | | 2022 |
Net cash provided by (used in) operating activities | | $ | 761,583 | | $ | (75,608) |
Net cash provided by (used in) investing activities | | | 35,115,075 | | | (2,436) |
Net cash provided by financing activities | | | — | | | — |
Effect of exchange rate on cash, cash equivalents and restricted cash | | | 84,307 | | | (955,185) |
Net increase (decrease) in cash, cash equivalents and restricted cash | | $ | 35,960,965 | | $ | (1,033,229) |
Net cash flow provided by operating activities for the six months ended April 30, 2023 was $761,583, which primarily reflected the non-cash items adjustment mainly consisting of amortization of right-of-use assets of approximately $55,000 and stock-based compensation and service expense of approximately $1,068,000 due to shares granted for services, and the changes in operating assets and liabilities mainly consisting of a decrease in interest receivable of approximately $262,000 000 resulting from our collection of note related interest in the six months ended April 30, 2023, a decrease in other assets of approximately $55,000, an increase in salary payable of approximately $204,000, and an increase in due to related parties of approximately $683,000 driven by expenses paid by our related parties on behalf of us in the six months ended April 30, 2023, offset by an increase in accounts receivable of approximately $60,000, and our consolidated net loss of approximately $1,486,000.
Net cash flow used in operating activities for the six months ended April 30, 2022 was $75,608, which primarily reflected our consolidated net loss of approximately 3,504,000, and the changes in operating assets and liabilities mainly consisting of an increase in interest receivable of approximately $74,000, and a decrease in operating lease liabilities of approximately $107,000, offset by a decrease in account receivable of approximately $222,000 driven by our efforts at collection, a decrease in other assets of approximately $293,000 mainly due to the decrease in prepaid directors and officers’ liability insurance premium of approximately $214,000 resulting from amortization of prepaid premium in the first half of fiscal 2022 and the decrease in prepaid professional fees of approximately $85,000 driven by recognition as expense over the first half of fiscal 2022, and an increase in salary payable of approximately $109,000, and an increase in accrued liabilities and other payables of approximately $182,000, which was mainly attributable an increase in accrued professional service fees of approximately $120,000 driven by increased professional service providers and an increase in other payables of approximately $60,000, and the add-back of non-cash items mainly consisting of amortization of right-of-use assets of approximately $169,000 and stock-based compensation and service expense of approximately $2,589,000.
Net cash flow provided by investing activities was $35,115,075 for the six months ended April 30, 2023 as compared to net cash flow used in investing activities of $2,436 for the six months ended April 30, 2022. During the six months ended April 30, 2023, we received proceeds from note receivable of $7,500,000 and proceeds from sale of short-term investments of approximately $27,615,000. During the six months ended April 30, 2022, we made payment for purchase of property and equipment of approximately $2,000.
There was no financing activity during the six months ended April 30, 2023.