The name The Long Journey in Chinese / Japanese...

鵬程萬里 is an ancient Chinese proverb used in modern times to wish someone a long and successful career.

It's really about the 10,000 Flight of the Peng (Peng, also known as Roc is a mythical fish that can turn into a bird and take flight).

莊子
Zhuangzi or Chuang Tzu

Breaking down each character:
1. Peng or Roc (a kind of bird).
2. Journey (in this case, a flight).
3. 10,000 (Ten Thousand).
4. Li is a unit of distance often referred to as a “Chinese Mile,” though the real distance is about half a kilometer.

Direct Translation: “Peng's Journey [of] 10,000 Li.”
Literal meaning: “The 10,000-Li Flying Range Of The Roc.”
Perceived meaning: “To have a bright future” or “To go far.”

This proverb/idiom comes from the book of Zhuangzi or Chuang Tzu. It tells the tale of a huge fish that could turn into a gigantic bird. This bird was called a “peng” and was many miles long. This legendary size allowed the Peng to fly from the Northern Sea to the Southern Sea in a single bound.

Wishing someone “a Peng's Journey of 10,000 Li” will imply that they can travel far without stopping and will have great success, a long career, and a prosperous future.

不怕路遠隻怕志短 is a Chinese proverb that literally translates as “Fear not long roads; fear only short ambition,” or “Don't fear that the road is long, only fear that your will/ambition/aspiration is short.”

Figuratively, this means: However difficult the goal is, one can achieve it as long as one is determined to do so.

Others may translate the meaning as “Don't let a lack of willpower stop you from pressing onward in your journey.”

讀萬卷書行萬里路 is a lifelong suggestion for expanding your horizons by gaining knowledge, experience, and seeing the world.

Of course, this was written long ago when it was hard to travel 10,000 miles (at least 1000 years before the invention of the airplane).
With air travel and the business I'm in, I often achieve that lifetime goal on a monthly basis.
However, I am a little behind in the book count.

Note: An ancient Chinese mile (里 or lǐ) referred to in this proverb is about a third of a British/American mile. However, at that time, this was a great distance to travel.

千里も一里 is a Japanese proverb that states “A journey of a thousand miles feels like only one mile.” It is understood that in the proverb, this applies when going to see the one you love.

Note that the “mile” or 里 used in this proverb is an old Chinese “li” (pronounced “ri” in Japanese). It's not actually a mile, as the measurement is really closer to 500 meters (it would take 3 of these to get close to a western mile). Still, 1000里 (333 miles) is a long way.