const toChineseNum = (num) => {

			  const unit = ['', '十', '百', '千']

			  const counts = ['零', '一', '二', '三', '四', '五', '六', '七', '八', '九']

			  const pre = Math.floor(num / 10000)

			  const next = num % 10000

			  let getfour = (mynum, flag = false) => {

			        if(!mynum){return ''}

			  	let i = 0, str = ''

			  	while(flag ? i < 4 : mynum > 0 ) {

			  		count = mynum % 10

			  		mynum = Math.floor(mynum / 10)

			  		str = (count ? counts[count] + unit[i] : str[0] == '零' ? '' : str.length && i ? '零' : '') + str

			  		i++

			  	}

			  	return str

			  }

			  return pre ? getfour(pre) + '万' + getfour(next, true) : getfour(num)

			}

    		console.log(toChineseNum(59900670))