One of them is the use of Asian characters in the text. Korean characters are not well defined and font sizes tend to be small.

其中一个问题就是，教材中用到亚洲文字是，例如，韩语文字显示不是很好，字体偏小。

youdao

When looking at the ceiling lighting fixtures, Korean characters (Hangul) are found on them. This totally reflects the Korean origin of the elevator.

当望住天花板上的照明装置，可以在上面找到韩国语字体(Hangul)，完全反映了电梯产自韩国。

youdao

The Korean Language Society is demanding that the signboard be written in Korean because it is "absurd" to have Chinese characters inscribed on a Korean cultural heritage.

韩文学会等团体要求用韩文书写牌匾，称在韩国历史遗迹上书写汉字是"荒谬"的。

youdao

Considering that the entire futuristic Korean story is performed by its characters in plain English, and that we have no reason to believe that these later post-apocalyptic humans would even incorporate English into their own language, it feels less like a world-building method, and more like the writers being unnecessarily clever.

FORBES: Review: 'Cloud Atlas' is a Noble Disaster

Actors Kevin Spacey, Julia Louis-Dreyfus and Claire Danes, who play government characters on series, were among the attendees, as was Korean entertainer Psy.

NPR: Obama Jokes About Radical 2nd Term Changes

In 2010, South Korean researchers successfully created 3-D animated children's e-books in which characters leap off the page technology which could soon find commercial applications.

WSJ: Enhanced E-Books: Blowing Up the Book