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Employee benefit (Details) - CNY (¥) ¥ in Thousands | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Employee benefit |  |
Employee benefit expenses | ¥ 4,208,153 | ¥ 3,825,281

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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Balance Type: | debit
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