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                    |  |  | Q4 2020 | Q4 2021 | Q4 2022 | Q4 2023 | Q4 2024 |  
                    | |  | ASSETS | 
 |  |  |  |  |  |  |  
                    | |  | A. CURRENT ASSETS AND SHORT-TERM INVESTMENTS | 
 |  | 356,691 | 401,956 | 415,663 | 377,352 | 365,284 |  
                    | |  | I. Cash and cash equivalents | 
 |  | 44,359 | 97,299 | 57,796 | 56,204 | 101,876 |  
                    | |  | 1. Cash | 
 |  | 22,359 | 74,299 | 47,796 | 43,204 | 98,376 |  
                    | |  | 2. Cash equivalents | 
 |  | 22,000 | 23,000 | 10,000 | 13,000 | 3,500 |  
                    | |  | II. Short-term financial investments | 
 |  |  |  |  |  |  |  
                    | |  | 1. Trading securities | 
 |  |  |  |  |  |  |  
                    | |  | 2. Provision for diminution in value of trading securities | 
 |  |  |  |  |  |  |  
                    | |  | 3. Investments holding until maturity | 
 |  |  |  |  |  |  |  
                    | |  | III. Short-term receivables | 
 |  | 121,819 | 112,325 | 177,262 | 158,278 | 115,182 |  
                    | |  | 1.  Short-term receivables of customers | 
 |  | 107,583 | 87,650 | 136,740 | 129,533 | 98,510 |  
                    | |  | 2. Prepayments to suppliers | 
 |  | 2,515 | 11,260 | 5,293 | 4,658 | 1,930 |  
                    | |  | 3. Short-term intercompany receivables | 
 |  |  |  |  |  |  |  
                    | |  | 4. Receivables according to the progress of construction contracts | 
 |  |  |  |  |  |  |  
                    | |  | 5. Receivables on short-term loans | 
 |  | 11,418 |  |  |  |  |  
                    | |  | 6. Other short-term receivables | 
 |  | 1,374 | 15,138 | 37,481 | 25,868 | 17,028 |  
                    | |  | 7. Provision for doubtful short-term receivables | 
 |  | -1,071 | -1,723 | -2,252 | -1,781 | -2,286 |  
                    | |  | IV. Inventories | 
 |  | 190,451 | 192,226 | 177,086 | 159,573 | 147,476 |  
                    | |  | 1. Inventories | 
 |  | 197,321 | 198,752 | 180,427 | 163,110 | 151,842 |  
                    | |  | 2. Provision for decline in value of inventories | 
 |  | -6,871 | -6,526 | -3,341 | -3,536 | -4,366 |  
                    | |  | V. Other current assets | 
 |  | 62 | 105 | 3,518 | 3,297 | 750 |  
                    | |  | 1. Short-term prepaid expenses | 
 |  |  |  | 24 | 481 | 681 |  
                    | |  | 2. Deductible VAT | 
 |  |  |  | 3,389 | 734 |  |  
                    | |  | 3. Taxes and the State Receivables | 
 |  | 62 | 105 | 105 | 2,082 | 69 |  
                    | |  | 4. Repurchasing and reselling transactions in government bonds | 
 |  |  |  |  |  |  |  
                    | |  | 5. Other current assets | 
 |  |  |  |  |  |  |  
                    | |  | B. FIXED ASSETS AND LONG-TERM INVESTMENTS | 
 |  | 131,604 | 126,175 | 131,790 | 128,082 | 130,637 |  
                    | |  | I. Long-term receivables | 
 |  |  |  |  |  |  |  
                    | |  | 1. Long-term customer's receivables | 
 |  |  |  |  |  |  |  
                    | |  | 2. Business capital in the subsidiary units | 
 |  |  |  |  |  |  |  
                    | |  | 3. Internal long-term receivables | 
 |  |  |  |  |  |  |  
                    | |  | 4. Receivables on long-term loans | 
 |  |  |  |  |  |  |  
                    | |  | 5. Other long-term receivables | 
 |  |  |  |  |  |  |  
                    | |  | 6. Provision for doubtful long-term receivables | 
 |  |  |  |  |  |  |  
                    | |  | II. Fixed assets | 
 |  | 119,639 | 114,254 | 118,151 | 113,201 | 112,309 |  
                    | |  | 1. Tangible fixed assets | 
 |  | 119,539 | 113,977 | 117,909 | 112,909 | 112,093 |  
                    | |  | - Cost | 
 |  | 255,420 | 242,736 | 252,528 | 256,418 | 265,472 |  
                    | |  | - Accumulated depreciation | 
 |  | -135,881 | -128,760 | -134,619 | -143,509 | -153,379 |  
                    | |  | 2. Fixed assets of financial leasing | 
 |  |  |  |  |  |  |  
                    | |  | - Cost | 
 |  |  |  |  |  |  |  
                    | |  | - Accumulated depreciation | 
 |  |  |  |  |  |  |  
                    | |  | 3. Intangible fixed assets | 
 |  | 99 | 277 | 241 | 292 | 215 |  
                    | |  | - Cost | 
 |  | 183 | 393 | 393 | 510 | 510 |  
                    | |  | - Accumulated depreciation | 
 |  | -84 | -116 | -152 | -218 | -294 |  
                    | |  | III. Real Estate Investments | 
 |  |  |  |  |  |  |  
                    | |  | - Cost | 
 |  |  |  |  |  |  |  
                    | |  | - Accumulated depreciation | 
 |  |  |  |  |  |  |  
                    | |  | IV. Long-term assets in progress | 
 |  | 673 | 8,083 | 820 | 1,080 | 1,816 |  
                    | |  | 1. Costs of  long-term production, business in progress | 
 |  |  |  |  |  | 1,816 |  
                    | |  | 2. Costs of construction in progress | 
 |  | 673 | 8,083 | 820 | 1,080 |  |  
                    | |  | IV. Long-term financial investments | 
 |  | 10,573 | 10,573 | 10,573 | 10,573 | 10,573 |  
                    | |  | 1. Investment in subsidiaries | 
 |  |  |  |  |  |  |  
                    | |  | 2. Investments in associated companies, joint ventures | 
 |  |  |  |  |  |  |  
                    | |  | 3. Other investments in equity instruments | 
 |  | 10,573 | 10,573 | 10,573 | 10,573 | 10,573 |  
                    | |  | 4. Provision for diminution in value of financial long-term investments | 
 |  |  |  |  |  |  |  
                    | |  | 5. Investments holding until maturity | 
 |  |  |  |  |  |  |  
                    | |  | V. Total other long-term assets | 
 |  | 720 | 540 | 2,247 | 3,229 | 5,939 |  
                    | |  | 1. Long-term prepaid expenses | 
 |  | 720 | 540 | 2,247 | 3,229 | 5,939 |  
                    | |  | 2. Deferred income tax assets | 
 |  |  |  |  |  |  |  
                    | |  | 3. Other long-term assets | 
 |  |  |  |  |  |  |  
                    | |  | VI. Goodwills | 
 |  |  |  |  |  |  |  
                    | |  | TOTAL ASSETS | 
 |  | 488,295 | 528,131 | 547,452 | 505,434 | 495,920 |  
                    | |  | CAPITAL RESOURCES | 
 |  |  |  |  |  |  |  
                    | |  | A. LIABILITIES | 
 |  | 246,079 | 289,746 | 332,053 | 283,410 | 274,777 |  
                    | |  | I. Current liabilities | 
 |  | 246,079 | 289,746 | 332,053 | 279,601 | 269,971 |  
                    | |  | 1. Borrowings and short-term financial leased liabilities | 
 |  | 553 |  |  |  |  |  
                    | |  | 2. Long-term borrowings are due to pay | 
 |  |  |  |  |  |  |  
                    | |  | 3. Short-term payables to sellers | 
 |  | 90,690 | 112,115 | 117,306 | 110,274 | 122,764 |  
                    | |  | 4. Advances from customers | 
 |  | 7,914 | 44,517 | 56,121 | 6,944 | 5,217 |  
                    | |  | 5. Taxes and other payables to the State Budget | 
 |  | 16,868 | 3,895 | 2,183 | 5,197 | 21,441 |  
                    | |  | 6. Payables to employees | 
 |  | 25,534 | 14,383 | 8,108 | 3,734 | 4,255 |  
                    | |  | 7. Short-term accrued expenses | 
 |  | 513 | 1,326 | 1,110 | 1,392 | 1,118 |  
                    | |  | 8. Short-term intercompany payables | 
 |  | 81,329 |  |  |  |  |  
                    | |  | 9. Payables to the scheduled progress of construction contracts | 
 |  |  |  |  |  |  |  
                    | |  | 10. Short-term unrealized Revenue | 
 |  | 774 | 280 | 280 | 335 | 368 |  
                    | |  | 11. Other short-term payables | 
 |  | 17,802 | 100,113 | 111,221 | 97,350 | 71,696 |  
                    | |  | 12. Provision for short term payables | 
 |  |  | 2,779 | 19,154 | 27,769 | 27,723 |  
                    | |  | 13. Bonus and welfare fund | 
 |  | 4,100 | 10,338 | 16,571 | 26,605 | 15,390 |  
                    | |  | 14. Price stabilization fund | 
 |  |  |  |  |  |  |  
                    | |  | 15. Repurchasing and reselling transactions in government bonds | 
 |  |  |  |  |  |  |  
                    | |  | II. Long-term liabilities | 
 |  |  |  |  | 3,809 | 4,806 |  
                    | |  | 1. Long-term payables to sellers | 
 |  |  |  |  |  |  |  
                    | |  | 2. Long-term accrued expenses | 
 |  |  |  |  |  |  |  
                    | |  | 3. Intercompany payables on business capital | 
 |  |  |  |  |  |  |  
                    | |  | 4. Long-term intra-company payables | 
 |  |  |  |  |  |  |  
                    | |  | 5. Other long-term payables | 
 |  |  |  |  | 3,809 | 4,806 |  
                    | |  | 6. Borrowings and long-term financial leased liabilities | 
 |  |  |  |  |  |  |  
                    | |  | 7. Convertible bonds | 
 |  |  |  |  |  |  |  
                    | |  | 8. Deferred income tax payables | 
 |  |  |  |  |  |  |  
                    | |  | 9. Provision for job loss allowance | 
 |  |  |  |  |  |  |  
                    | |  | 10. Provision for long-term payables | 
 |  |  |  |  |  |  |  
                    | |  | 11. Long-term unrealized revenue | 
 |  |  |  |  |  |  |  
                    | |  | 12. Development fund of science and technology | 
 |  |  |  |  |  |  |  
                    | |  | B. OWNER'S EQUITY | 
 |  | 242,217 | 238,385 | 215,400 | 222,024 | 221,143 |  
                    | |  | I. ShareHolder's equity | 
 |  | 242,223 | 238,057 | 215,400 | 222,029 | 221,169 |  
                    | |  | 1. Owner's investment capital | 
 |  | 68,000 | 68,000 | 68,000 | 68,000 | 68,000 |  
                    | |  | 2. Share capital surplus | 
 |  |  |  |  |  |  |  
                    | |  | 3. Bond conversion option | 
 |  |  |  |  |  |  |  
                    | |  | 4. Other owner's capital | 
 |  |  |  |  |  |  |  
                    | |  | 5. Treasury shares | 
 |  |  |  |  |  |  |  
                    | |  | 6. Differences upon asset revaluation | 
 |  |  |  |  |  |  |  
                    | |  | 7. Differences upon foreign exchange rate | 
 |  |  |  |  |  |  |  
                    | |  | 8. Investment and development funds | 
 |  | 112,401 | 125,033 | 125,033 | 128,700 | 128,700 |  
                    | |  | 9. Financial reserve funds | 
 |  |  |  |  |  |  |  
                    | |  | 10. Other funds belonging to owner's equity | 
 |  |  |  |  |  |  |  
                    | |  | 11. After tax undistributed profit | 
 |  | 61,822 | 45,024 | 22,367 | 25,329 | 24,469 |  
                    | |  | - After tax undistributed profit accumulated to the end of prior period | 
 |  | 25,715 | 23,666 |  |  |  |  
                    | |  | - Profit after tax undistributed this period | 
 |  | 36,107 | 21,358 | 22,367 | 25,329 | 24,469 |  
                    | |  | 12. Investment capital resource for basic construction | 
 |  |  |  |  |  |  |  
                    | |  | 13. Assistance fund for arrangement of enterprises | 
 |  |  |  |  |  |  |  
                    | |  | 14. interest of shareholders who not control | 
 |  |  |  |  |  |  |  
                    | |  | II. Funding resources and other funds | 
 |  | -6 | 328 |  | -5 | -26 |  
                    | |  | 1. Funding resources | 
 |  | -6 | 328 |  | -5 | -26 |  
                    | |  | 2. Funding resources that form fixed assets | 
 |  |  |  |  |  |  |  
                    | |  | 3. Retrenchment provision fund | 
 |  |  |  |  |  |  |  
                    | |  | TOTAL CAPITAL RESOURCES | 
 |  | 488,295 | 528,131 | 547,452 | 505,434 | 495,920 |      
    There is no report. |  |