1. It is the Eight Immortals crossing the sea, each showing his or her own magical powers: a metaphor for each having his or her own way of doing things. It is also a metaphor for each showing his/her skills and competing with each other. Example: The competition has begun, production experts~.
2. Yes, there is no first stroke in the character "八": the character "八" has not been written in the first stroke, which means that there is no clue about the matter. For example: He also said that things will work out! But so far, it has not been successful.
3. Seeing is better than hearing a hundred times: hearing, hearing. No matter how much you hear, it is better to see it with your own eyes. It means that hearing more is not more reliable or impressive than seeing it. For example: In the past, all the lion images painted by painters were all hairy. I see that the lion now does not look like this, so~.