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PROPERTY, EQUIPMENT AND SOFTWARE | 12 Months Ended
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Dec. 31, 2013
PROPERTY, EQUIPMENT AND SOFTWARE |
PROPERTY, EQUIPMENT AND SOFTWARE | 7. PROPERTY, EQUIPMENT AND SOFTWARE Property, equipment and software and its related accumulated depreciation and amortization as of December 31, 2012 and 2013 were as follows:
|  | 2012 |  | 2013 |
|  | RMB |  | RMB |
Buildings |  | 892,430,743 |  | 1,050,102,815 |
Computer equipment |  | 232,200,943 |  | 256,542,169 |
Website-related equipment |  | 107,209,531 |  | 135,116,574 |
Furniture and fixtures |  | 58,079,451 |  | 60,468,480 |
Software |  | 43,782,203 |  | 52,640,160 |
Leasehold improvements |  | 28,866,215 |  | 44,835,912 |
Construction in progress |  | 81,050,521 |  | 199,363,516 |
Less: accumulated depreciation and amortization |  | (319,682,416 | ) | (386,125,933 | )
Total net book value |  | 1,123,937,191 |  | 1,412,943,693 |
From November, 2011, the Company started to build an information and technology center in Chengdu. All direct costs of the information and technology center were originally capitalized as construction in progress. Depreciation expense for the years ended December 31, 2011, 2012 and 2013 was RMB78,809,867, RMB88,462,807 and RMB110,494,928, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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