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Selling Expenses (Details) - Schedule of selling expenses - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule of selling expenses [Abstract] |  |  |
Salaries and social welfare | $ 58,915 | $ 761,774 | $ 1,765,019
Travelling expenses | 1,256 | 34,244 | 170,931
Service fee |  | 12,369 | 41,437
Advertising & promotion | 27,908 | 19,811 | 56,259
Entertainment fee | 3,377 | 4,848 | 42,656
Office expense |  |  | 1,960
Others | 364 | 2,224 | 4,567
Total Selling expenses | $ 91,820 | $ 835,270 | $ 2,082,829

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- Definition Office expenses paid. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Salaries and social welfare. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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- Definition Service fee. + References No definition available. + Details
Name: | llit_ServiceFee
Namespace Prefix: | llit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | llit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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=120395209&loc=SL114868664-224227 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration

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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=120395209&loc=SL114868664-224227 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration

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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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- 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=120395209&loc=SL114868664-224227 + Details
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