A Warm Welcome in Chinese / Japanese...

歡迎光臨 would be the ultimate Chinese “welcome mat.” Except it will be on your wall, and people will not step on it.

In a somewhat literal translation, you could say it means “I feel happy as I welcome you, as you have brought a shining light to this place with your arrival,” or more simply, “I am happy you've come as your presents brightens up the place.”

It has become common for this greeting to be announced by the staff upon the arrival of any customer into a fancy store in China. You will also see these characters on the “welcome mats” in front of 4 and 5-star hotels in China.

Having this on a wall scroll is an extra nice touch. I have seen a few horizontal scrolls with this phrase on the wall behind the reception desk of better hotels or near the front door of fine shops. At the fanciest department stores and restaurants in China, several greeters (almost always young women) will stand by the front door, all wearing sashes with this phrase embroidered. As you walk in, they will bow and say “huan ying guang lin” to welcome you to the establishment.

Note: The first two and last two characters do make words in Korean Hanja but are seldom used as a sentence like this in Korean.