The list of testing criteria eligible for operation in this Certificate includes: Soil testing in the laboratory; Field soil testing; Testing concrete mixtures and heavy concrete; Aggregate testing for concrete and mortar; Testing construction mortar; Testing masonry; Testing of self-inserting concrete tiles; Construction lime testing; Mechanical testing of cement; Non-destructive method; Construction steel testing; Asphalt concrete testing; Bitumen plastic testing. Technical standards used for the tests are fully listed, including Vietnamese and foreign standards (if any). When there is a new version of technical standards to replace the old standards, the corresponding new standards must be applied. This certificate is valid for 5 years from the date of issue.