lún dào nǐ shí bǎ wù pǐn shù liàng hé yòng tú shuō qīng chǔ shì qíng jiù huì wǎng qián zǒu

轮到你时，把物品、数量和用途说清楚，事情就会往前走。

When it's your turn, clearly state the items, quantity, and purpose, and things will move forward.