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                    |  |  | Q4 2022 | Q2 2023 | Q4 2023 | Q4 2024 | Q2 2025 |  
                    | |  | ASSETS | 
 |  |  |  |  |  |  |  
                    | |  | A. CURRENT ASSETS AND SHORT-TERM INVESTMENTS | 
 |  | 511,537 | 481,890 | 466,191 | 432,670 | 428,306 |  
                    | |  | I. Cash and cash equivalents | 
 |  | 9,649 | 5,080 | 2,239 | 2,416 | 1,276 |  
                    | |  | 1. Cash | 
 |  | 9,649 | 5,080 | 2,239 | 2,416 | 1,276 |  
                    | |  | 2. Cash equivalents | 
 |  |  |  |  |  |  |  
                    | |  | II. Short-term financial investments | 
 |  | 400 | 419 | 419 | 445 | 464 |  
                    | |  | 1. Trading securities | 
 |  |  |  |  |  |  |  
                    | |  | 2. Provision for diminution in value of trading securities | 
 |  |  |  |  |  |  |  
                    | |  | 3. Investments holding until maturity | 
 |  | 400 | 419 | 419 | 445 | 464 |  
                    | |  | III. Short-term receivables | 
 |  | 305,309 | 301,461 | 310,790 | 292,090 | 282,138 |  
                    | |  | 1.  Short-term receivables of customers | 
 |  | 231,627 | 228,535 | 223,939 | 202,305 | 191,352 |  
                    | |  | 2. Prepayments to suppliers | 
 |  | 22,343 | 22,425 | 20,364 | 20,075 | 19,927 |  
                    | |  | 3. Short-term intercompany receivables | 
 |  |  |  |  |  |  |  
                    | |  | 4. Receivables according to the progress of construction contracts | 
 |  |  |  |  |  |  |  
                    | |  | 5. Receivables on short-term loans | 
 |  | 2,659 | 2,659 | 2,659 | 2,659 | 2,659 |  
                    | |  | 6. Other short-term receivables | 
 |  | 75,061 | 75,519 | 94,086 | 99,202 | 103,077 |  
                    | |  | 7. Provision for doubtful short-term receivables | 
 |  | -26,381 | -27,677 | -30,257 | -32,151 | -34,877 |  
                    | |  | IV. Inventories | 
 |  | 175,048 | 156,018 | 133,265 | 117,811 | 124,197 |  
                    | |  | 1. Inventories | 
 |  | 175,048 | 156,018 | 133,265 | 117,811 | 124,197 |  
                    | |  | 2. Provision for decline in value of inventories | 
 |  |  |  |  |  |  |  
                    | |  | V. Other current assets | 
 |  | 21,130 | 18,911 | 19,477 | 19,908 | 20,231 |  
                    | |  | 1. Short-term prepaid expenses | 
 |  | 294 | 174 | 220 | 290 | 457 |  
                    | |  | 2. Deductible VAT | 
 |  | 20,836 | 18,737 | 19,257 | 19,618 | 19,774 |  
                    | |  | 3. Taxes and the State Receivables | 
 |  |  |  |  |  |  |  
                    | |  | 4. Repurchasing and reselling transactions in government bonds | 
 |  |  |  |  |  |  |  
                    | |  | 5. Other current assets | 
 |  |  |  |  |  |  |  
                    | |  | B. FIXED ASSETS AND LONG-TERM INVESTMENTS | 
 |  | 275,982 | 271,264 | 266,613 | 224,863 | 220,280 |  
                    | |  | I. Long-term receivables | 
 |  | 48 | 48 | 48 | 48 | 48 |  
                    | |  | 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 | 
 |  | 48 | 48 | 48 | 48 | 48 |  
                    | |  | 6. Provision for doubtful long-term receivables | 
 |  |  |  |  |  |  |  
                    | |  | II. Fixed assets | 
 |  | 231,700 | 227,241 | 222,795 | 214,065 | 209,606 |  
                    | |  | 1. Tangible fixed assets | 
 |  | 230,080 | 225,621 | 221,175 | 212,445 | 207,986 |  
                    | |  | - Cost | 
 |  | 389,622 | 389,622 | 379,523 | 379,693 | 379,693 |  
                    | |  | - Accumulated depreciation | 
 |  | -159,541 | -164,001 | -158,349 | -167,248 | -171,707 |  
                    | |  | 2. Fixed assets of financial leasing | 
 |  |  |  |  |  |  |  
                    | |  | - Cost | 
 |  |  |  |  |  |  |  
                    | |  | - Accumulated depreciation | 
 |  |  |  |  |  |  |  
                    | |  | 3. Intangible fixed assets | 
 |  | 1,620 | 1,620 | 1,620 | 1,620 | 1,620 |  
                    | |  | - Cost | 
 |  | 2,176 | 2,176 | 2,176 | 2,176 | 2,176 |  
                    | |  | - Accumulated depreciation | 
 |  | -556 | -556 | -556 | -556 | -556 |  
                    | |  | III. Real Estate Investments | 
 |  |  |  |  |  |  |  
                    | |  | - Cost | 
 |  |  |  |  |  |  |  
                    | |  | - Accumulated depreciation | 
 |  |  |  |  |  |  |  
                    | |  | IV. Long-term assets in progress | 
 |  | 781 | 781 | 781 | 781 | 781 |  
                    | |  | 1. Costs of  long-term production, business in progress | 
 |  |  |  |  |  |  |  
                    | |  | 2. Costs of construction in progress | 
 |  | 781 | 781 | 781 | 781 | 781 |  
                    | |  | IV. Long-term financial investments | 
 |  | 36,904 | 36,850 | 36,850 | 4,145 | 4,145 |  
                    | |  | 1. Investment in subsidiaries | 
 |  |  |  |  |  |  |  
                    | |  | 2. Investments in associated companies, joint ventures | 
 |  | 36,884 | 36,830 | 36,830 | 39,125 | 39,125 |  
                    | |  | 3. Other investments in equity instruments | 
 |  | 20 | 20 | 20 | 20 | 20 |  
                    | |  | 4. Provision for diminution in value of financial long-term investments | 
 |  |  |  |  | -35,000 | -35,000 |  
                    | |  | 5. Investments holding until maturity | 
 |  |  |  |  |  |  |  
                    | |  | V. Total other long-term assets | 
 |  | 6,548 | 6,343 | 6,139 | 5,824 | 5,699 |  
                    | |  | 1. Long-term prepaid expenses | 
 |  | 6,295 | 6,096 | 5,896 | 5,591 | 5,472 |  
                    | |  | 2. Deferred income tax assets | 
 |  | 253 | 248 | 243 | 233 | 227 |  
                    | |  | 3. Other long-term assets | 
 |  |  |  |  |  |  |  
                    | |  | VI. Goodwills | 
 |  |  |  |  |  |  |  
                    | |  | TOTAL ASSETS | 
 |  | 787,519 | 753,154 | 732,804 | 657,533 | 648,587 |  
                    | |  | CAPITAL RESOURCES | 
 |  |  |  |  |  |  |  
                    | |  | A. LIABILITIES | 
 |  | 896,503 | 883,804 | 882,610 | 878,206 | 883,871 |  
                    | |  | I. Current liabilities | 
 |  | 812,823 | 802,118 | 810,030 | 816,626 | 827,791 |  
                    | |  | 1. Borrowings and short-term financial leased liabilities | 
 |  | 191,357 | 190,975 | 188,438 | 187,708 | 189,335 |  
                    | |  | 2. Long-term borrowings are due to pay | 
 |  |  |  |  |  |  |  
                    | |  | 3. Short-term payables to sellers | 
 |  | 158,735 | 153,263 | 156,421 | 158,039 | 158,299 |  
                    | |  | 4. Advances from customers | 
 |  | 79,947 | 79,407 | 81,570 | 55,509 | 56,086 |  
                    | |  | 5. Taxes and other payables to the State Budget | 
 |  | 74,561 | 73,857 | 72,609 | 86,403 | 85,562 |  
                    | |  | 6. Payables to employees | 
 |  | 12,708 | 12,309 | 11,802 | 14,455 | 13,296 |  
                    | |  | 7. Short-term accrued expenses | 
 |  | 110,621 | 92,607 | 59,857 | 60,291 | 60,508 |  
                    | |  | 8. Short-term intercompany payables | 
 |  |  |  |  |  |  |  
                    | |  | 9. Payables to the scheduled progress of construction contracts | 
 |  |  |  |  |  |  |  
                    | |  | 10. Short-term unrealized Revenue | 
 |  |  |  |  |  |  |  
                    | |  | 11. Other short-term payables | 
 |  | 183,005 | 197,845 | 237,480 | 252,376 | 262,864 |  
                    | |  | 12. Provision for short term payables | 
 |  |  |  |  |  |  |  
                    | |  | 13. Bonus and welfare fund | 
 |  | 1,890 | 1,856 | 1,851 | 1,845 | 1,842 |  
                    | |  | 14. Price stabilization fund | 
 |  |  |  |  |  |  |  
                    | |  | 15. Repurchasing and reselling transactions in government bonds | 
 |  |  |  |  |  |  |  
                    | |  | II. Long-term liabilities | 
 |  | 83,680 | 81,686 | 72,580 | 61,580 | 56,080 |  
                    | |  | 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 | 
 |  |  |  |  |  |  |  
                    | |  | 6. Borrowings and long-term financial leased liabilities | 
 |  | 83,655 | 81,661 | 72,555 | 61,555 | 56,055 |  
                    | |  | 7. Convertible bonds | 
 |  |  |  |  |  |  |  
                    | |  | 8. Deferred income tax payables | 
 |  |  |  |  |  |  |  
                    | |  | 9. Provision for job loss allowance | 
 |  |  |  |  |  |  |  
                    | |  | 10. Provision for long-term payables | 
 |  | 25 | 25 | 25 | 25 | 25 |  
                    | |  | 11. Long-term unrealized revenue | 
 |  |  |  |  |  |  |  
                    | |  | 12. Development fund of science and technology | 
 |  |  |  |  |  |  |  
                    | |  | B. OWNER'S EQUITY | 
 |  | -108,985 | -130,650 | -149,806 | -220,673 | -235,285 |  
                    | |  | I. ShareHolder's equity | 
 |  | -108,985 | -130,650 | -149,806 | -220,673 | -235,285 |  
                    | |  | 1. Owner's investment capital | 
 |  | 83,536 | 83,536 | 83,536 | 83,536 | 83,536 |  
                    | |  | 2. Share capital surplus | 
 |  | 11,927 | 11,927 | 11,927 | 11,927 | 11,927 |  
                    | |  | 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 | 
 |  | 42,341 | 42,341 | 42,341 | 42,341 | 42,341 |  
                    | |  | 9. Financial reserve funds | 
 |  |  |  |  |  |  |  
                    | |  | 10. Other funds belonging to owner's equity | 
 |  |  |  |  |  |  |  
                    | |  | 11. After tax undistributed profit | 
 |  | -247,891 | -268,847 | -287,997 | -358,926 | -373,329 |  
                    | |  | - After tax undistributed profit accumulated to the end of prior period | 
 |  | -237,992 | -247,891 | -247,891 | -287,331 | -358,926 |  
                    | |  | - Profit after tax undistributed this period | 
 |  | -9,900 | -20,956 | -40,106 | -71,595 | -14,403 |  
                    | |  | 12. Investment capital resource for basic construction | 
 |  |  |  |  |  |  |  
                    | |  | 13. Assistance fund for arrangement of enterprises | 
 |  |  |  |  |  |  |  
                    | |  | 14. interest of shareholders who not control | 
 |  | 1,103 | 394 | 388 | 449 | 240 |  
                    | |  | II. Funding resources and other funds | 
 |  |  |  |  |  |  |  
                    | |  | 1. Funding resources | 
 |  |  |  |  |  |  |  
                    | |  | 2. Funding resources that form fixed assets | 
 |  |  |  |  |  |  |  
                    | |  | 3. Retrenchment provision fund | 
 |  |  |  |  |  |  |  
                    | |  | TOTAL CAPITAL RESOURCES | 
 |  | 787,519 | 753,154 | 732,804 | 657,533 | 648,587 |      
    There is no report. |  |