Subject + 擅长 + Verb/Noun
擅长 (shàncháng) means "to be good at" or "to excel at" a particular skill or activity. It is more formal than 善于 or the colloquial 很会, and is often used in written or descriptive contexts. It is followed directly by a verb or noun indicating the skill.
她擅长画水彩画,作品经常参加展览。
tā shàncháng huà shuǐcǎihuà, zuòpǐn jīngcháng cānjiā zhǎnlǎn.
She is good at watercolor painting, and her works are often exhibited.
我弟弟擅长做饭,尤其是川菜。
wǒ dìdi shàncháng zuòfàn, yóuqí shì chuāncài.
My younger brother is good at cooking, especially Sichuan cuisine.
他擅长跟陌生人聊天,到哪儿都能交到朋友。
tā shàncháng gēn mòshēngrén liáotiān, dào nǎr dōu néng jiāo dào péngyou.
He's good at chatting with strangers and can make friends wherever he goes.