Go to the posted coordinates. Find a panel sign as shown in the picture below:
Decipher the following clues to find the final coordinates.
1. At what year was Choi Chi-Won born (A.T.). Let this 3-digit number be ABC.
2. "At the age of DE, he went to study to the land of Tang..."
3. "At the age of FG, he passed the state examinations..."
4. "At the age of HJ, by issuing a grent manifesto, se suppressed a rebellion aroused by Hwang-So..."
5. "At the age of KL, he began to wander all over the country..."
The cache can be found at:
N 35° L[A+F].[G-C][D+H]J
E 129° [B-J][B+K].[E-F][D+J]K
Happy caching 
!