| 精 |
jīng yán | to research carefully / to study intensively |
| 精 |
jīng | essence / extract / vitality / energy / semen / sperm / mythical goblin spirit / highly perfected / elite / the pick of sth / proficient (refined ability) / extremely (fine) / selected rice (archaic) |
| 研 |
yán | to grind / study / research |