This is the 5409th most frequent Chinese word.
何其
"How extremely; how very."
"何其" is used here to express the speaker's strong admiration and amazement at how dazzling the stars are.
天上的星星，何其璀璨。
The stars in the sky are so dazzling.
"何其" conveys the idea of extreme gratitude or happiness, highlighting the rarity or significance of such an event.
遇见你，何其有幸。
Meeting you, what a fortune it is!
"何其" is utilized to emphasize the grandeur and magnificence of the scenery.