Well, to paraphrase and not completely copy the text point by point:
New items introduced: convoy ticket and plunder ticket (excuse the non-literal translation, but as long as they do what they do, it's fine, right?)
Convoy: 1 free SS convoy per day, extra cost either a convoy ticket or 6* ingot
Success gives 40** coupon, failure 25**, can only be attempted plundered twice (it says changed from thrice, not sure if we have a thrice limit but... apparently there should be one?)
Successful S or A convoy might reward a convoy ticket
Plunder: top 100 ranked battle player have one free SS plunder chance, extra cost either a plunder ticket or 10* ingot
Success gives 50**, failure gives nil. It says that in case the chance is bought by ingot, a plunder ticket will be refunded in case of failure. It seems, however, ticket themselves are not refunded if you fail if you used that to begin with.
Successfully plundering a S or A convoy might give you a plunder ticket
Player may convoy and/or plunder a total of 3 times. So that's 3 plunder, 2 plunder 1 convoy, 1 plunder 2 convoy or 3 convoys.
*price might vary, but as long as there is a number, I'm going to copy it
**similarly, reward might vary, but.....