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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Cash flows from operating activities:      
Net Income $ 3,108,144 $ 4,940,441 $ 5,908,479
Adjustments to reconcile net income to net cash provided by (used in) operating activities:      
Amortization of the right-of-use assets 62,410 62,410  
Depreciation and amortization 1,201,229 1,105,588 1,188,173
Provision of doubtful accounts (7,918) 188,095 (9,301)
Inventory reserve 92,059 (290,968) 67,719
Deferred tax expense (46,187) (86,495) 48,656
Unrealized gain from marketable securities (323,400)    
Investment income (69,494) (57,984) (89,197)
Changes in operating assets and liabilities:      
Accounts receivable (545,175) (660,667) 706,582
Bank acceptance notes receivable 387,673 (5,583,925) (2,171,300)
Inventories 46,801 1,402,620 (3,492,342)
Advances to suppliers (855,977) 498,378 653,028
Other current assets (1,020,875) 125,261 (29,853)
Accounts payable 2,015,833 613,339 (46,999)
Accounts payable - related parties     (3,042)
Advance from customers (1,221,897) 1,461,407 (2,232,858)
Advance from customers - related parties (17,467) 29,973 2,254
Deferred revenue (407,563) (314,238) (319,982)
Tax payables (1,142,721) 988,423 (834,183)
Accrued expenses and other payables (897,496) 722,284 73,969
Operating lease liabilities (12,945) (67,928)  
Net cash provided by (used in) operating activities 345,034 5,076,014 (580,197)
Cash flows from investing activities:      
Purchase of property and equipment (3,491,564) (449,766) (616,388)
Purchase of intangible assets (1,810) (8,798) (635)
Proceeds from (payment made for) long term investment   82,972 (64,165)
Purchase of available-for-sale securities (20,000,000)   14,559
Acquisition of non-controlling interest (706,658)   (133,552)
Net cash used in investing activities (24,200,032) (375,592) (800,181)
Cash flows from financing activities:      
Proceeds from bank loans   7,135,009 5,089,651
Repayment of bank loans (7,681,081) (4,994,506) (3,635,465)
Proceeds from (repayment of) bank notes payable 7,804,778   (581,674)
Cash receipts from equity issuance, net of issuance cost 23,869,641    
Payment for deferred offering costs     (365,310)
Net cash provided by financing activities 23,993,338 2,140,503 507,202
Effect of exchange rate change on Cash 601,903 431,765 (157,163)
Net increase (decrease) in cash and cash equivalents 740,243 7,272,690 (1,030,339)
Cash and cash equivalents at beginning of period 11,867,130 4,594,440 5,624,779
Cash and cash equivalents at end of period 12,607,373 11,867,130 4,594,440
Supplemental cash flow information      
Cash paid for interest 152,499 280,169 210,588
Cash paid for income taxes $ 820,972 275,607 $ 1,109,655
Operating lease right of use assets obtained in exchange of lease liabilities   $ 143,443