Where is the right place to hang a framed vertical calligraphy work in the living room?

If it's just to decorate the living room, anywhere will do.

If you want to stand out, especially your own works, you can hang them in the middle and decorate them with two red Chinese knots on both sides. If there is another chance to add two narrower vertical banners (bamboo or plum blossoms on one side of the pine tree), it will be too late.