正规

zhèng guī regular; according to standards

买

mǎi to buy; to purchase

号

hào ordinal number; day of a month; mark; sign; business establishment; size; ship suffix; horn (wind instrument); bugle call; assumed name; to take a pulse; classifier used to indicate number of people

háo roar; cry; CL:個|个[ge4]

交易

jiāo yì (business) transaction; business deal; CL:筆|笔[bi3]

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