VISA REQUIRED FOR OUR TRIP TO CHINA

WE ARE STAYING IN TIANJIN FOR THREE DAYS BEFORE OUR CRUISE,WHEN OUR CRUISE STARTS IT GOES TO JAPAN THEN ON TO CHINA,THEN TO VEITNAM ,THEN TO HONG KONG WHAT TYPE OF VISA DO I NEED FOR THIS TRIP OR CAN I GET MY VISA ON BOARD I AM WITH ROYAL CARIBBEAN MANY THANKS