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                    |  |  | Q4 2020 | Q4 2021 | Q4 2022 | Q4 2023 | Q4 2024 |  
                    | |  | ASSETS | 
 |  |  |  |  |  |  |  
                    | |  | A. CURRENT ASSETS AND SHORT-TERM INVESTMENTS | 
 |  | 295,976 | 286,671 | 272,909 | 249,660 | 236,310 |  
                    | |  | I. Cash and cash equivalents | 
 |  | 111,291 | 44,137 | 22,990 | 32,426 | 14,673 |  
                    | |  | 1. Cash | 
 |  | 41,791 | 37,137 | 22,990 | 32,426 | 14,673 |  
                    | |  | 2. Cash equivalents | 
 |  | 69,500 | 7,000 |  |  |  |  
                    | |  | II. Short-term financial investments | 
 |  | 30,343 | 105,996 | 128,284 | 107,774 | 97,701 |  
                    | |  | 1. Trading securities | 
 |  |  |  |  |  |  |  
                    | |  | 2. Provision for diminution in value of trading securities | 
 |  |  |  |  |  |  |  
                    | |  | 3. Investments holding until maturity | 
 |  | 30,343 | 105,996 | 128,284 | 107,774 | 97,701 |  
                    | |  | III. Short-term receivables | 
 |  | 146,165 | 132,914 | 118,331 | 107,553 | 121,867 |  
                    | |  | 1.  Short-term receivables of customers | 
 |  | 142,753 | 120,291 | 81,975 | 92,926 | 103,603 |  
                    | |  | 2. Prepayments to suppliers | 
 |  | 440 | 297 | 211 | 304 | 586 |  
                    | |  | 3. Short-term intercompany receivables | 
 |  |  |  |  |  |  |  
                    | |  | 4. Receivables according to the progress of construction contracts | 
 |  |  |  |  |  |  |  
                    | |  | 5. Receivables on short-term loans | 
 |  |  |  |  |  |  |  
                    | |  | 6. Other short-term receivables | 
 |  | 3,923 | 12,660 | 36,478 | 14,657 | 18,012 |  
                    | |  | 7. Provision for doubtful short-term receivables | 
 |  | -950 | -334 | -334 | -334 | -334 |  
                    | |  | IV. Inventories | 
 |  | 5,491 | 1,397 | 1,898 | 320 | 447 |  
                    | |  | 1. Inventories | 
 |  | 5,491 | 1,397 | 1,898 | 320 | 447 |  
                    | |  | 2. Provision for decline in value of inventories | 
 |  |  |  |  |  |  |  
                    | |  | V. Other current assets | 
 |  | 2,686 | 2,227 | 1,406 | 1,587 | 1,623 |  
                    | |  | 1. Short-term prepaid expenses | 
 |  | 2,686 | 2,227 | 1,406 | 1,587 | 1,623 |  
                    | |  | 2. Deductible VAT | 
 |  |  |  |  |  |  |  
                    | |  | 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 | 
 |  | 5,375 | 6,985 | 8,273 | 6,908 | 7,510 |  
                    | |  | I. Long-term receivables | 
 |  | 3,778 | 3,270 | 3,093 | 3,064 | 4,966 |  
                    | |  | 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 | 
 |  | 3,778 | 3,270 | 3,093 | 3,064 | 4,966 |  
                    | |  | 6. Provision for doubtful long-term receivables | 
 |  |  |  |  |  |  |  
                    | |  | II. Fixed assets | 
 |  | 162 | 2,888 | 4,084 | 2,739 | 1,395 |  
                    | |  | 1. Tangible fixed assets | 
 |  | 162 | 2,888 | 4,084 | 2,739 | 1,395 |  
                    | |  | - Cost | 
 |  | 263,026 | 265,934 | 268,217 | 268,217 | 268,217 |  
                    | |  | - Accumulated depreciation | 
 |  | -262,865 | -263,046 | -264,133 | -265,477 | -266,821 |  
                    | |  | 2. Fixed assets of financial leasing | 
 |  |  |  |  |  |  |  
                    | |  | - Cost | 
 |  |  |  |  |  |  |  
                    | |  | - Accumulated depreciation | 
 |  |  |  |  |  |  |  
                    | |  | 3. Intangible fixed assets | 
 |  |  |  |  |  |  |  
                    | |  | - Cost | 
 |  | 1,019 | 1,019 | 1,019 | 1,019 | 1,019 |  
                    | |  | - Accumulated depreciation | 
 |  | -1,019 | -1,019 | -1,019 | -1,019 | -1,019 |  
                    | |  | III. Real Estate Investments | 
 |  |  |  |  |  |  |  
                    | |  | - Cost | 
 |  |  |  |  |  |  |  
                    | |  | - Accumulated depreciation | 
 |  |  |  |  |  |  |  
                    | |  | IV. Long-term assets in progress | 
 |  |  |  |  |  |  |  
                    | |  | 1. Costs of  long-term production, business in progress | 
 |  |  |  |  |  |  |  
                    | |  | 2. Costs of construction in progress | 
 |  |  |  |  |  |  |  
                    | |  | IV. Long-term financial investments | 
 |  |  |  |  |  |  |  
                    | |  | 1. Investment in subsidiaries | 
 |  |  |  |  |  |  |  
                    | |  | 2. Investments in associated companies, joint ventures | 
 |  |  |  |  |  |  |  
                    | |  | 3. Other investments in equity instruments | 
 |  |  |  |  |  |  |  
                    | |  | 4. Provision for diminution in value of financial long-term investments | 
 |  |  |  |  |  |  |  
                    | |  | 5. Investments holding until maturity | 
 |  |  |  |  |  |  |  
                    | |  | V. Total other long-term assets | 
 |  | 1,435 | 827 | 1,097 | 1,104 | 1,149 |  
                    | |  | 1. Long-term prepaid expenses | 
 |  | 1,435 | 827 | 1,097 | 1,104 | 1,149 |  
                    | |  | 2. Deferred income tax assets | 
 |  |  |  |  |  |  |  
                    | |  | 3. Other long-term assets | 
 |  |  |  |  |  |  |  
                    | |  | VI. Goodwills | 
 |  |  |  |  |  |  |  
                    | |  | TOTAL ASSETS | 
 |  | 301,351 | 293,656 | 281,183 | 256,568 | 243,820 |  
                    | |  | CAPITAL RESOURCES | 
 |  |  |  |  |  |  |  
                    | |  | A. LIABILITIES | 
 |  | 114,144 | 103,233 | 92,747 | 74,844 | 72,121 |  
                    | |  | I. Current liabilities | 
 |  | 114,093 | 103,233 | 92,747 | 74,844 | 72,121 |  
                    | |  | 1. Borrowings and short-term financial leased liabilities | 
 |  |  |  |  |  |  |  
                    | |  | 2. Long-term borrowings are due to pay | 
 |  |  |  |  |  |  |  
                    | |  | 3. Short-term payables to sellers | 
 |  | 52,415 | 43,983 | 28,347 | 22,517 | 21,583 |  
                    | |  | 4. Advances from customers | 
 |  | 1,114 | 5 | 55 | 269 | 162 |  
                    | |  | 5. Taxes and other payables to the State Budget | 
 |  | 9,313 | 5,334 | 4,350 | 5,697 | 4,923 |  
                    | |  | 6. Payables to employees | 
 |  | 27,308 | 30,524 | 31,449 | 23,392 | 22,480 |  
                    | |  | 7. Short-term accrued expenses | 
 |  | 12,716 | 12,735 | 18,373 | 10,659 | 10,114 |  
                    | |  | 8. Short-term intercompany payables | 
 |  |  |  |  |  |  |  
                    | |  | 9. Payables to the scheduled progress of construction contracts | 
 |  |  |  |  |  |  |  
                    | |  | 10. Short-term unrealized Revenue | 
 |  | 5 | 5 | 36 | 36 | 31 |  
                    | |  | 11. Other short-term payables | 
 |  | 5,168 | 5,653 | 4,704 | 7,412 | 7,361 |  
                    | |  | 12. Provision for short term payables | 
 |  |  |  |  |  |  |  
                    | |  | 13. Bonus and welfare fund | 
 |  | 6,054 | 4,992 | 5,431 | 4,862 | 5,468 |  
                    | |  | 14. Price stabilization fund | 
 |  |  |  |  |  |  |  
                    | |  | 15. Repurchasing and reselling transactions in government bonds | 
 |  |  |  |  |  |  |  
                    | |  | II. Long-term liabilities | 
 |  | 51 |  |  |  |  |  
                    | |  | 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 | 
 |  | 51 |  |  |  |  |  
                    | |  | 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 | 
 |  | 187,207 | 190,424 | 188,436 | 181,723 | 171,699 |  
                    | |  | I. ShareHolder's equity | 
 |  | 187,207 | 190,424 | 188,436 | 181,723 | 171,699 |  
                    | |  | 1. Owner's investment capital | 
 |  | 70,630 | 70,630 | 70,630 | 70,630 | 70,630 |  
                    | |  | 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 | 
 |  | 75,679 | 81,836 | 81,836 | 81,836 | 81,836 |  
                    | |  | 9. Financial reserve funds | 
 |  |  |  |  |  |  |  
                    | |  | 10. Other funds belonging to owner's equity | 
 |  |  |  |  |  |  |  
                    | |  | 11. After tax undistributed profit | 
 |  | 40,898 | 37,958 | 35,970 | 29,257 | 19,232 |  
                    | |  | - After tax undistributed profit accumulated to the end of prior period | 
 |  | 10,114 | 10,495 | 14,452 | 8,956 | 5,705 |  
                    | |  | - Profit after tax undistributed this period | 
 |  | 30,784 | 27,463 | 21,518 | 20,301 | 13,528 |  
                    | |  | 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 | 
 |  |  |  |  |  |  |  
                    | |  | 1. Funding resources | 
 |  |  |  |  |  |  |  
                    | |  | 2. Funding resources that form fixed assets | 
 |  |  |  |  |  |  |  
                    | |  | 3. Retrenchment provision fund | 
 |  |  |  |  |  |  |  
                    | |  | TOTAL CAPITAL RESOURCES | 
 |  | 301,351 | 293,656 | 281,183 | 256,568 | 243,820 |      
    There is no report. |  |