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Other Current Assets (Details) - Schedule of other current assets - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Schedule of other current assets [Abstract]    
Prepaid advertising expense [1] $ 1,033,280
Deferred contract costs [2] 800,461 272,804
Office rental deposit 98,159 86,287
Interest receivable 29,945 32,416
Prepaid rental fees 54 15,827
Prepaid consulting service fees 468,302 78,627
Others 216,130 94,167
Total $ 1,613,051 $ 1,613,408
[1] As of December 31, 2020, the balance of prepaid advertising expenses represents payments of advertising expenses to three vendors. Among the balance of $1,033,280 as of December 31, 2020, $459,235 was subsequently refunded from the vendor to VIE as VIE suspended cooperation with the vendor, and the remaining was expensed during the six months ended June 30, 2021 with the services provided by the vendors.
[2] As of June 30, 2021 and December 31, 2020, the balances of deferred contract costs represented the travel and media expenses which were directly related to certain contracts with customers. The costs and expenses were incurred so that VIE would fulfil its performance obligation committed to its customers and were expected to be recovered.