训练的时候重点关注那些坐标到达，什么程度是正常的

我在训练的时候go2的max episode length只有700多，理论上这个值不应该接近1000吗，训练出的go2策略在sim2sim后表现的很不稳定，碰到台阶什么都就乱摆腿，然后摔倒。在gym里面又是正常的。目前a1训出的策略可以实现sim2sim（排除了sim2sim代码的问题）

Start by comparing the Go2 and A1 training configurations and their maximum episode-length results in the gym environment. Then reproduce the Go2 policy in sim2sim, especially its behavior when encountering steps, and determine whether the episode length near 700 is expected or indicates a training discrepancy. Done means the cause of the unstable Go2 behavior and the expected episode length are documented.

Written by the indexing model from the issue text.