mǎi mài
买卖兴隆
mǎi mài xīng lóng
Business is booming
做了一笔买卖。
zuò le yī bǐ mǎi mài.
Made a business deal.
他在城里开了家小买卖。
tā zài chéng lǐ kāi le jiā xiǎo mǎi mài.
He opened a small business in the city.