仅/只 + Condition + 就 + Result
就 (jiù) is a versatile adverb that, in this usage, emphasizes that something alone or by itself is already remarkable or sufficient. It highlights that even a limited condition produces an impressive result. For example, 仅周四晚的首映就获得了5000万美元 means "the Thursday night premiere alone earned $50 million."
光是房租就花掉了我一半的工资。
guāng shì fángzū jiù huādiào le wǒ yībàn de gōngzī.
Rent alone takes up half my salary.
就这一道菜就要两百块,太贵了。
jiù zhè yī dào cài jiù yào liǎng bǎi kuài, tài guì le.
This one dish alone costs two hundred yuan — too expensive.
仅第一天就有上万人来参观展览。
jǐn dì yī tiān jiù yǒu shàng wàn rén lái cānguān zhǎnlǎn.
On the first day alone, over ten thousand people came to visit the exhibition.