Verified answer

1.我的專長是中文

My specialty is Chinese.

2.我對於中文很在行

I am good at Chinese.

1.我的專長是中文

My speciality is Chinese language and literature.

2.我對於中文很在行

I am specialized in Chinese.

You can also say:

My expertise is Chinese.

I specialize in Chinese.

I am an expert in Chinese.

My speciality is Chinese.

I am very good at Chinese.

1.My specialty is a Chinese

2.I regarding Chinese very in line