The principal offender in this case is Mr. B. The court suspended the execution of the death penalty for Mr. B for two years, and all his accomplices were given a lighter punishment, which is also in line with China's policy of killing less and killing more. Generally speaking, the immediate execution of the death penalty can only be applied to criminals with particularly bad circumstances, particularly cruel means and great social harm.
Furthermore, according to your statement, Mr. A's death was not caused by Mr. B's obvious intentional homicide.
Therefore, it seems appropriate to punish Mr. B and the accomplice.
Personally, I feel that Mr. 3 B's compensation to the families of the victims is a bit small. If the appeal period is included, the victim's family can appeal separately on the civil part.
The court of appeal is accepted by the people's court at the next higher level. But you can appeal to the people's court that made the judgment. The appeal must be filed within the appeal period.
I hope I can solve your problem.