bèi wèn dào lái huá mù dì shí bù yòng jiǎng hěn cháng zhǐ shuō wǒ lái chū chāi cān jiā huì yì

被问到来华目的时，不用讲很长，只说：“我来出差，参加会议。

When asked about the purpose of your visit to China, you don't need to say much, just say: 'I'm here on business, for a meeting.'