Other Receivables, Net (Details) - USD ($)		Dec. 31, 2019	Jun. 30, 2019
Other Receivables Net
Advances to customers	[1]	$ 10,216,897	$ 4,237,270
Cash advances		99,331	54,953
Security deposit			43,492
Other receivables, net		$ 10,316,228	$ 4,335,715

[1] As of December 31, 2019, the Company entered into certain contracts with customers (state-owned entities) where the Company's services included freight costs and cost of commodities to be shipped to customers' designated locations. The Company prepaid the costs of commodities and recognized as advance payments on behalf of its customers. These advance payments on behalf of the customers will be repaid to the Company when either the contract terms are expired or the contracts are terminated by the Company. The Company is expected to deliver its services under all such contracts by December 31, 2020.