To make SDS products to be Unique and trouble-free for the distributor and end-user, SDS staff works very hard and smart to make sure that every SDS products will conform the taste of the most strict quality precisian. **Precise Injection system： it makes the SDS engines working very efficiently, and do great help for the emission improvement. **Important parts: To make sure every SDS engine have a stable performance and longer service life, every SDS engines has been applied with NSK/NTN bearing, balancer shaft, and important parts such as crankshaft, connecting rod, piston has been checked 100%. **Testing before ex-works: every SDS engine will be tested for one 1 hours MIN and power meters will measure the output. So that the engine will arrive to the customer in a perfect way and ready to work at any minute. **Q/C control: the in-parts has been checked and inspected strictly, so that we can make sure that every part on SDS engine is qualified. and SDS have specific Q/C control person to monitor the production process and do performance testing.