can you get ferry boat from Tianjin to Qinhuangdao with berth?

I’m afraid there is no ferry service. I suggest you take a bullet train from the cerntral railway station to Qinhuangdao. The travel time is about 1.5 hour, and the fare is CNY120 for the second class seat, CNY202 for the first class seat and CNY228 for the business class.