Meaning of diàn xià:
diàn xià
殿下
Noun
Your Majesty (honorific); His or Her Highness
Zūnjìng de diànxià, wǒmen dōu qīdài nín jīntiān de jiǎnghuà.
尊敬的殿下,我们都期待您今天的讲话。
Your Majesty, we are all looking forward to your speech today.
Qǐng zhùyì, diànxià jí jiāng dàodá.
请注意,殿下即将到达。
Please note, His Highness is about to arrive.