Intangible Assets (Details) - USD ($)	3 Months Ended
Jun. 30, 2020	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Payments to acquire intangible assets	$ 3,531,657
Intangible assets period, description	Business license , land use right and backlog has an estimated weighted-average amortization period of approximately 15 years, 46 years and 12 months respectively.
Amortization expense	$ 136,333	$ 33,333

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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