We may decide to enhance our liquidity position or increase our cash reserve for future operations and investments through additional financing. The issuance and sale of additional equity would result in further dilution to our shareholders and ADS holders, and the terms of these securities may include liquidation or other preferences that adversely affect your rights as an ADS holder. The incurrence of indebtedness would result in increased fixed obligations and could result in operating covenants that would restrict our operations, which could potentially dilute your interest. If we raise additional funds through collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams or research programs or to grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market products or drug candidates that we would otherwise prefer to develop and market ourselves.
Operating Activities
Net cash used in operating activities for the six months ended June 30, 2022 was RMB571.2 million (US$85.3 million). Our net loss was RMB1,046.9 million (US$156.3 million) for the same period. The difference between our net loss and our net cash used in operating activities was primarily attributable to certain non-cash expenses, including share-based compensation of RMB196.9 million (US$29.4 million), equity in loss of an affiliate of RMB181.0 million (US$27.0 million), non-cash gains on fair value change of put right liabilities of RMB30.8 million (US$4.6 million) and non-cash loss on fair value change of short-term and other investments of RMB23.8 million (US$3.5 million), and changes in certain working capital items, including a decrease in accounts receivable of RMB32.6 million (US$4.9 million), a decrease in prepayments and other receivables of RMB85.5 million (US$12.8 million), and a decrease in inventories of RMB27.2 million (US$4.1 million), partially offset by a decrease in accruals and other payables of RMB49.1 million (US$7.3 million), and an increase of contract assets of RMB37.3 million (US$5.6 million).
Net cash used in operating activities for the six months ended June 30, 2021 was RMB442.6 million. Our net loss was RMB1,076.5 million for the same period. The difference between our net loss and our net cash used in operating activities was primarily attributable to certain non-cash expenses, including share-based compensation of RMB334.7 million, equity in loss of an affiliate of RMB114.2 million, non-cash gains on fair value change of put right liabilities of RMB14.6 million and fair value change of short-term and other investments of RMB13.5 million, and changes in certain working capital items, including a decrease in accounts receivable of RMB130.5 million and an increase in accruals and other payables of RMB104.5 million, partially offset by an increase of contract assets of RMB15.5 million.
Investing Activities
Net cash generated from investing activities for the six months ended June 30, 2022 was RMB499.3 million (US$74.6 million). The net cash increase was primarily attributable to RMB2,326.2 million (US$347.3 million) of the proceeds from disposal of short-term and other investments, partially offset by RMB1,808.0 million (US$269.9 million) of the cash used in the purchase of short-term and other investments.
Net cash used in investing activities for the six months ended June 30, 2021 was RMB381.4 million. The net cash decrease was primarily attributable to RMB4,054.0 million of the cash used in the purchase of short-term and other investments, partially offset by RMB3,676.6 million of the proceeds from disposal of short-term and other investments.
Financing Activities
Net cash generated from financing activities for the six months ended June 30, 2022 was RMB35.4 million (US$5.3 million), attributable to the proceeds from exercise of stock options of RMB40.2 million (US$6.0 million).
Net cash generated from financing activities for the six months ended June 30, 2021 was RMB486.2 million, primarily attributable to the proceeds from exercise of warrants of RMB589.4 million, partially offset by cash used for payments of issuance cost in relation to private placement of RMB128.8 million.
Capital Expenditures
Our capital expenditures were incurred for purposes of purchasing property, equipment and software. Our capital expenditures were RMB4.1 million and RMB27.5 million (US$4.1 million) in six months ended June 30, 2021 and 2022, respectively.