Korean Calligraphy of Be Happy Always in old Korean Hanja...

安貧樂道 means “It's better to be happy than rich” in Chinese.

Even if you are poor, you should still feel satisfied in your life...

...Satisfaction, happiness and the meaning of your life come from within yourself and not from money or riches of the world.

In Chinese, there are a lot of four-character proverbs which express some very old philosophies.
Though there are only four characters on this scroll, in Chinese, the meanings often surpass the dictionary definition of each character.

In this case, you should not set your expectations too high for the money or riches you wish to have. One who sets their expectations too high is almost always disappointed. Instead, you should cherish what you have, seek to improve yourself from within, and not measure your worth by the size of your bank account.

See Also:  A Sly Rabbit Will Have Three Openings to Its Den

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.

Long ago in what is now China, there were many kingdoms throughout the land. This time period is known as “The Warring States Period” by historians because these kingdoms often did not get along with each other.

Sometime around 279 B.C. the Kingdom of Chu was a large but not particularly powerful kingdom. Part of the reason it lacked power was the fact that the King was surrounded by “yes men” who told him only what he wanted to hear. Many of the King's court officials were corrupt and incompetent which did not help the situation.

The King was not blameless himself, as he started spending much of his time being entertained by his many concubines.

One of the King's ministers, Zhuang Xin, saw problems on the horizon for the Kingdom, and warned the King, “Your Majesty, you are surrounded by people who tell you what you want to hear. They tell you things to make you happy and cause you to ignore important state affairs. If this is allowed to continue, the Kingdom of Chu will surely perish, and fall into ruins.”

This enraged the King who scolded Zhuang Xin for insulting the country and accused him of trying to create resentment among the people. Zhuang Xin explained, “I dare not curse the Kingdom of Chu but I feel that we face great danger in the future because of the current situation.” The King was simply not impressed with Zhuang Xin's words.
Seeing the King's displeasure with him and the King's fondness for his court of corrupt officials, Zhuang Xin asked permission from the King that he may take leave of the Kingdom of Chu, and travel to the State of Zhao to live. The King agreed, and Zhuang Xin left the Kingdom of Chu, perhaps forever.

Five months later, troops from the neighboring Kingdom of Qin invaded Chu, taking a huge tract of land. The King of Chu went into exile, and it appeared that soon, the Kingdom of Chu would no longer exist.

The King of Chu remembered the words of Zhuang Xin and sent some of his men to find him. Immediately, Zhuang Xin returned to meet the King. The first question asked by the King was “What can I do now?”

Zhuang Xin told the King this story:

A shepherd woke one morning to find a sheep missing. Looking at the pen saw a hole in the fence where a wolf had come through to steal one of his sheep. His friends told him that he had best fix the hole at once. But the Shepherd thought since the sheep is already gone, there is no use fixing the hole.
The next morning, another sheep was missing. And the Shepherd realized that he must mend the fence at once. Zhuang Xin then went on to make suggestions about what could be done to reclaim the land lost to the Kingdom of Qin, and reclaim the former glory and integrity of the Kingdom of Chu.

The Chinese idiom shown above came from this reply from Zhuang Xin to the King of Chu almost 2,300 years ago.
It translates roughly into English as...
“Even if you have lost some sheep, it's never too late to mend the fence.”

This proverb, 亡羊补牢犹未为晚, is often used in modern China when suggesting in a hopeful way that someone change their ways, or fix something in their life. It might be used to suggest fixing a marriage, quitting smoking, or getting back on track after taking an unfortunate path in life among other things one might fix in their life.

I suppose in the same way that we might say, “Today is the first day of the rest of your life” in our western cultures to suggest that you can always start anew.

Note: This does have Korean pronunciation but is not a well-known proverb in Korean (only Koreans familiar with ancient Chinese history would know it). Best if your audience is Chinese.