how can we get the natural gas in our daily life?(4)

after backfilling, it does not mean that the place can be used. Next, we need check the general purge pressure，pipe drying and audio leak, etc. That's called pipe physical examination. Ensureing all the pipe under the ground is good for construction, the workers will start to do the next step.

Finally, promoting the civilized construction and green construction, we must complish a very important work -- restoration. Along the working belt, we need to recover nearly everything as before. And then, farmers will do the farming as soon as possible, mountains and rivers will back to be green and fllow through them.

After all of above job, the left is the waiting for the final acceptance. Later, this pipeline will be fully operational to country buliding and service people daily life.