The contractor issues 100% of the acceptance value, the investor pays 92% of the completed acceptance value (92% of the issued invoice value), retain 8%, (wait for payment 5%, and wait for BH 3%). With a large-scale project such as Son La hydroelectric and Lai Chau hydropower plants under the specific mechanism retention rate of only 3%, but the total amount that has been retained from the start to the completion is up toVND hundreds of billions. If the payment is waited for settlement by the guarantee, the guarantee fee also accounts for a relatively large proportion of the contractor's expenses, not to mention difficulties when the bank approves the guarantee. If the investor does not approve the guarantee or the contractor is not guaranteed by the bank, the outstanding debts will always be from 3% to 8% of the value already completed, which is a big difficulty and cause economic damages to the contractor.

The Song Da Corporation would like to propose:

- The Government and Ministries will supplement and finalize the documents stipulated in the management of construction investment, strengthen the management, to ensure the investment is not entangled about the procedure and only be invested when the capital is allocated.

- The government should have sanctions: Investors must open LC payment for contractors to avoid long liabilities.