Yan Jing's pinyin is: Yán jìng.

Among them, all Yan surnames are from Ji surnames and are descendants of Ji Chang. Yan is a China surname. After Chinese mainland used simplified characters, he first simplified "Yan" as "Yan", and the two simplified characters were changed to "Yan" (an ancient cursive script without a surname), but they were later restored to "Yan".

So now there are "Yan surname" and "Yan surname". The new edition of Xinhua Dictionary regards these two words as different surnames, but it is generally believed that their ancestors are the same.

I hope it helps you! Hope to adopt!