PROPERTY, PLANT AND EQUIPMENT - Summary of property and equipment (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ (1,629,871)	$ (1,689,936)
Property, plant and equipment	705	1
Land and Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	917,831	951,728
Plant and Machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,889	16,476
Office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	18,378	19,057
Project equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	633,054	656,434
Computer
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,825	10,365
Motor Vehicle
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 34,599	$ 35,877