under the wing ofpreppreposition: Relates noun or pronoun to another element of sentence--for example, "a picture of John," "She walked from my house to yours."
(being guided or protected by)
在…的保护下 zài de bǎo hù xià
在…的庇护下 zài de bì hù xià
The young student made rapid progress after he was taken under the wing of the master chef.