How can you avoid the boxer rebellion?

Answer 1

By not travelling back in time. If you mean: how could it have been prevented, the answer is that it probably would have happened in some form anyway as it was a reaction to the condescending and aggressive way in which Westerners were treating China in matters of diplomacy, commerce and religion. Only if the West had treated China with more respect in these fields and especially had refrained from very assertively trying to convert the Chinese to Christianity, Chinese resentment and the Boxer Rebellion might not have occurred.