How to say "待丹成时凭此兑换" (dài dān chéng shí píng cǐ duì huàn) in Chinese dialogue

dàidānchéngshípíngduìhuàn

to be used for exchange when the pills were ready.

Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0140:25
gōng
shān
pái

Gongshan Jade Tablets were distributed,

LINE 0240:26
PLAYING SCENE
dài
dān
chéng
shí
píng
duì
huàn

to be used for exchange when the pills were ready.

LINE 0340:29
suí
zhe
xīn
shì
de
xīng

With the rise of new forces

Show Information
Source MediaTV Series
Season & EpisodeS1 E8
Timestamp40:26
TMDB ID272715