in to on在下面的句子可以互换吗？

in to on在下面的句子可以互换吗？
1.The state of California lies on the Pacific Ocean in the west
on Mexico in the south
2. It neighbors/lies on/boarders Russia in the west and
Mongolia in the north.
上述两个句子的in分别可以改成to吗，比如下面的3,4两个句子就是用to.
3.Poland is bordered by Germany to the west
Guangdong is bounded by the Guangxi to the West
（to可以改成on或in吗？）
4.Yincuan Plain borders (on) Helan Mountain to the West

5.China faces the Pacific on the east（可改成in 或to 吗？）
这个句子中的on可以改成in 或者to吗？比如上述的3和2这两个句子