How did the japanese emulate china?
a. by embracing the shinto religion practiced by the chinese
b. by adopting a similar ideographic writing system
c. by persecuting buddhist communities
d. by rejecting lavish imperial courts and large bureaucracy

the lachish letters were written by hoshaiah, a military officer stationed possibly in mareshah,   and sent to yaush, possibly the commanding officer at lachish.

the series of letters were written in carbon ink in ancient hebrew on clay ostraca, shortly before lachish fell to the babylonian army of king nebuchadnezzar in 588/6 bc during the reign of zedekiah, king of judah.

true, they can both only can be studied with ancient text.