Also known as: Chinese Stitch

It is commonly found in chinese embroderies. Using contrasting threads will throw up the beauty of the design well.
back stitch foundation
Back stitch: Lay the foundation by doing a back stitch.
pekinese back stitch 1   pekinese back stitch2
Fig 1: Take another thread and needle and bring it out through A. Pass the needle under the stitch B-C, from above, as shown. Do not pluck the fabric underneath.       Fig 2: Now, pass the needle under the stitch A-B, from below, as shown.
pekinese back stitch3   pekinese back stitch4
Fig 3: You will see that a loop is formed at the stitch point B. Our aim would be to make such similar loops at each stitch point.
As the next action, take the needle under C-D from above.
  Fig 4: Now pass the needle under B-C from below. Continue this action of looping each stitch point by taking the needle under the stitches.
pekinese back stitch 5
Fig 5: Your completed pattern would look like this.

Make sure that while taking the needle and thread under each running stitch, you do not pluck the fabric underneath. You can use a blunt needle to acheive this.
Make sure to leave the back stitch just a bit loose in order to allow the other thread to pass through it easily.