The traditional Chinese, (not mechanized) process of mounting assures that your masterpiece is less easy to tear; the rice paper becomes more rigid when attached to a backing, and promotes easier display or framing.  This process is very time consuming ( see below)  and has multiple procedures to ensure the ink is "fasted" to the paper without fading or running of the ink.  When you do this,  the rice paper literally blends into the backing ( a more thick paper) and provides preservation.
A "paste" is produced from flower which takes about 1 day to cure.  The picture is placed on a heavier paper and affixed with the "paste" to assure attachment and preservation of the colors and picture.
The entire process for mounting takes about 3 days (so we try to do several at a time!).  This is what the "paste" or glue looks like and the brush used to coat the painting ( face down on the glass).
First, careful measurements must be made to assure the watercolor is square and ready for mounting on the thicker mounting paper. This step is essential if you are planning to frame with or without matting for your home.

The art is then moistened with water to take out all wrinkles and folds.
Glue mixture is now very carefully applied to the watercolor, face down, trying to not tear the wet, thin paper. This is done quickly to avoid any running of the color.
The mounting paper is laid on top of the prepared watercolor.
Again, very carefully the air and wrinkles need to be resolved and paste needs to be evenly distributed between watercolor and backing ( mounting ).
This continues until there are no bubbles, wrinkles, or defects of glue.  Fresh glue is applied to the corners to allow it to be placed on a wall, glass or wood for drying overnight.
The entire product is carefully removed (wet) from the mounting table to a surface (usually a wood board)  to dry overnight.  Once all borders are affixed, air is blown under the painting to separate it from the hanging surface.
  How do you want your masterpiece?
You can get your painting on rice paper just as it is and use matting and/or framing.  You can ask that it be mounted (with the special process above) which will decrease the possibility of tearing and assist in framing; or you can have it mounted and add silk around the borders of the painting to accent its beauty and frame with/without matting.  Asking that your painting be made on a scroll ( with silk) is another option. This hangs from a ribbon at the top of the scroll.
The first is a scroll with silk borders, the second is rice paper (un-mounted), the third is a mounted watercolor with silk borders and the last is a rice paper (unmounted)  watercolor framed.  If you wish to frame rice paper without mounting be exceptionally careful how the painting is attached to the backing to avoid tears in the paper and color fading or running.