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CONSOLIDATED STATEMENTS OF CASH FLOWS ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥)
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |
Net loss | ¥ (404,029) | $ (61,922) | ¥ (352,092) | ¥ (259,297)
Adjustments to reconcile net loss to net cash generated from operating activities: |  |  |  |
Share-based compensation (note 22) | 20,621 | 3,160 | 20,593 | 11,139
Loss in derecognition of underlying assets at sales-type lease commencement (note 10) |  |  | 21,229 | 0
Depreciation of property, plant and equipment (note 9) | 55,030 | 8,434 | 44,358 | 40,855
Amortization of intangible assets (note 12) | 15,756 | 2,415 | 11,995 | 4,161
Amortization of land lease payments (note 10) | 9,513 | 1,458 | 9,462 | 9,610
Lease expense to reduce operating lease ROU | 23,030 | 3,530 | 16,698 | 0
(Income) loss from equity method investments | (6,021) | (923) | 5,078 | 20,747
(Gain) loss on disposal of long-lived assets | (677) | (104) | 1,299 | (4,711)
Deferred tax expense | (13,347) | (2,046) | (22,458) | 7,502
Allowance for doubtful accounts, net | 6,058 | 928 | 24,544 | 10,605
Impairment of long-lived assets | 8,500 | 1,303 | 76,089 | 5,433
Impairment of Inventories |  |  | 890 | 1,702
Interest and consultation expenses | 81,359 | 12,469 | 53,229 | 46,232
(Gain) loss on disposal of subsidiaries (note 4) | 14,894 | 2,283 | 0 | (3,341)
Gain from disposal of an equity method investment (note 14) | (7,837) | (1,201) | 0 | (48,019)
Gain from revaluation of previously held equity interests (note 14) |  |  | (31,898) | (28,846)
Changes in operating assets and liabilities net of effects of acquisition and disposals: |  |  |  |
Accounts receivable | (6,167) | (945) | 3,574 | 48,384
Prepayments and other current assets | (82,497) | (12,643) | 11,047 | (9,876)
Inventories | (14,446) | (2,214) | (1,827) | 1,803
Other non-current assets | 392 | 60 | 1,860 | 41,081
Accounts payable | 11,119 | 1,704 | 2,840 | 530
Accrued expenses and other liabilities | 15,171 | 2,326 | (60,947) | 51,879
Deferred revenue | 84,543 | 12,957 | 953 | 13,269
Income tax payable | 105 | 16 | (3,010) | (45,719)
Accrued unrecognized tax benefit | (28,012) | (4,292) | (16,204) | 46,286
Operating lease liabilities | (12,824) | (1,965) | (12,649) | 0
Net cash used in operating activities | (229,766) | (35,212) | (195,347) | (38,591)
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |
Purchase of short-term investments |  |  |  | (252,250)
Redemption of short-term investments |  |  | 50,000 | 202,250
Purchase of land use right | (7,170) | (1,099) |  | 0
Investment in equity method investees | (163,844) | (25,110) |  | (15,000)
Prepayments for long-term investments | (28,490) | (4,366) |  | 0
Settlement of investment in CMCC |  |  | (105,119) | 0
Acquisitions of business, net of cash acquired | (8,336) | (1,278) | (420,559) | (528,740)
Acquisitions of property, plant and equipment | (168,023) | (25,751) | (232,691) | (165,596)
Acquisitions of intangible assets | (1,028) | (158) | (576) | (1,779)
Deposits for the purchases of property, plant and equipment | (336,681) | (51,599) | (468,234) | (598,800)
Refund from deposits for the purchases of property, plant and equipment |  |  | 15,000 | 9,844
Proceeds from disposal of an equity method investment (note 14) | 33,020 | 5,061 | 6,779 | 212,855
Proceeds from disposal of property, plant and equipment | 271 | 42 | 69,335 | 112,955
Proceeds from disposal of intangible assets |  |  |  | 2,563
Proceeds from principal portion of direct financing leases | 24,842 | 3,807 | 14,558 | 9,717
Proceeds from disposal of a subsidiary | 201,554 | 30,890 |  | 0
Cash distribution from equity method investments |  |  |  | 11,626
Purchase of available-for-sale debt securities | (80,000) | (12,261) |  | 0
Net cash used in investing activities | (533,885) | (81,822) | (1,071,507) | (1,000,355)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |
Proceeds from short-term bank borrowings | 740,434 | 113,477 | 285,500 | 726,746
Proceeds from long-term bank and other borrowings | 857,110 | 131,358 | 934,406 | 472,607
Borrowings from related parties (note 24) | 26,560 | 4,070 |  | 174,314
Repayment of secured borrowings | 0 |  |  | (243,268)
Repayment of short-term bank and other borrowings | (1,029,176) | (157,728) | (442,817) | (864,251)
Repayment of long-term bank and other borrowings | (241,825) | (37,061) | (253,828) | (504,792)
Purchase of subsidiary shares from noncontrolling interests | (25,653) | (3,931) | (9,993) | (58,314)
Capital injection from a noncontrolling interests in a subsidiary | 110,852 | 16,989 |  | 0
Proceeds from issuance of contingently redeemable noncontrolling interests of a subsidiary | 700,000 | 107,280 |  | 1,500,000
Net cash generated from financing activities | 1,138,302 | 174,454 | 513,268 | 1,203,042
Effect of foreign exchange rate changes on cash and cash equivalent and restricted cash | (2,563) | (394) | 1,161 | 459
Net increase (decrease) in cash | 372,088 | 57,026 | (752,425) | 164,555
Cash and cash equivalents and restricted cash at beginning of the year | 74,307 | 11,388 | 826,732 | 662,177
Cash and cash equivalents and restricted cash at end of the year | 446,395 | 68,414 | 74,307 | 826,732
Reconciliation of cash and cash equivalents and restricted cash to the consolidated balance sheets |  |  |  |
Cash and cash equivalents | 334,264 | 51,229 | 74,307 | 404,742
Restricted cash, current portion | 4,661 | 714 |  | 421,990
Restricted cash, noncurrent portion | 107,470 | 16,471 |  | 0
Total cash and cash equivalents and restricted cash | 446,395 |  | 74,307 | 826,732
Supplemental schedule of major cash flows information: |  |  |  |
Income tax paid | (3,259) | (499) | (17,267) | (36,559)
Interest paid | (73,848) | (11,318) | (64,250) | (59,492)
Supplemental schedule of major non-cash activities: |  |  |  |
Acquisition of investment through effective settlement in other receivables, advance to suppliers and other payables (note 4) | 602 | 92 | 685,669 | 0
Acquisition of property, plant and equipment, construction in progress and other intangible assets through utilization of deposits | 704,312 | 107,941 | 388,960 | 205,816
Acquisition of property, plant and equipment, construction in progress and other intangible assets through utilization included in accrued expense and other liabilities | ¥ 50,736 | $ 7,776 | ¥ 29,632 | ¥ 22,747

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