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Selling Expenses (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Selling and Marketing Expense [Abstract] |  |  |
Salaries and social welfare | $ 761,774 | $ 1,765,019 | $ 805,048
Travelling expenses | 34,244 | 170,931 | 150,648
Service fee | 12,369 | 41,437 | 84,445
Advertising & promotion | 19,811 | 56,259 | 76,592
Entertainment fee | 4,848 | 42,656 | 35,438
Office expense |  | 1,960 | 7,302
Others | 2,224 | 4,567 | 10,905
Total Selling expenses | $ 835,270 | $ 2,082,829 | $ 1,170,378

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- Definition Office expenses paid. + References No definition available. + Details
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- Definition Salaries and social welfare. + References No definition available. + Details
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- Definition Service fee. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The total expense recognized in the period for promotion, public relations, and brand or product advertising. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition Amount of selling and marketing expense classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition The aggregate total amount of expenses directly related to the marketing or selling of products or services. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Expenses incurred for travel and entertainment during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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