shomand of verbal skills. this is how effectively you will be able to make yourself convincing. my last advice is modesty. don't let others suspect you are being arrogant and showing off.
只有这样，你要有自信。第二重要的是良好的语言表达能力。这是如何有效地你将能够使自己信服。我最后的建议是谦逊。不要让别人怀疑你是傲慢和炫耀。