Please summarise the following rules into shorten one: It's not allowed to show only underage \uff08 0-17\uff09 images in mission ads (without adults). \n\nException \uff1a \n1. if in mission video \uff0c it can be allowed  if adult\uff08s\uff09  appear as main objectives with underage image more than 1 seconds \uff08even not appear in video the whole time . \n\nReminder : \n- How to judge underage in video ? ---> Any human image looks obviously under 15 yrs old will be taken as underage image .\n\n- Adult means people above 18yrs \uff08 including 18 yrs old \uff09 &  Please do not judge people in video is adult by their body shape ,we need to make sure we can see the people's full face to guarantee  this is the adult image but not underage ) \n\n