英语达人进来帮忙翻译一句话，非常感谢，中翻英

We left Beijing to Guangzhou yesterday afternoon, and now we have already started to check the company of guangzhou.

Yesterday afternoon we departed from Beijing to Guangzhou, and now we has begun to audit the
company in Guangzhou.

We have left Beijing to Guangzhou yesterday afternoon and now we begin to audit the companies in Guangzhou.

We were heading to Guangzhou from Beijing yesterday afternoon, and we are start auditing the Guangzhou company now.

we've left for GZ from BJ yesterday afternoon, now we're go on with the audit of GZ company