How to break through their "Great Wall of China" It's my move as White. I have no idea what to do. I feel like I'm going to get squashed to death.
What would be my best move or strategy in situations like these?
[FEN &quot;r2q1rk1/4b3/p1n1p1b1/1p1pPpPp/2pP1B1P/P1N2N2/1PP1Q3/2KR2R1 w - - 0 1&quot;]
In order to make progress, one or both of you need to break through that wall. Each of you seem to have the best chances on the side near the opponent's King--you have a passer on the kingside; your opponent has a lot of pressure on your queenside. 

First, look at his threats. ...b5-b4 seems to force the issue on the queenside by kicking your Knight and threatening your a-pawn. It's likely that the b file would be at least half-opened if Black plays ...b4. That's not great for you. However, it would free a4 for your Knight, so you could maybe reposition it to c5 at some point--that's not a bad thing, if you can survive the coming attack.

[FEN "r2q1rk1/4b3/p1n1p1b1/3pPpPp/1ppP1B1P/P1N2N2/1PP1Q3/2KR2R1 w - - 0 1"]


Position after ...b5-b4.



Now let's think offensively. Where can you break through his wall? If you can't push pawns of your own, Knights are usually the best at this sort of thing, since they can jump to the back lines. The nature of the pawn wall means their only jumping-off spots are the spaces just in front of enemy pawns. A great spot immediately suggests itself, then: f4! From f4, a White Knight would threaten three Black pawns, as well as Black's light-squared Bishop. If you could maneuver a Knight to f4, then, you may be able to break through on the kingside and really put Black's king in some trouble. It's too bad you don't have a light-square Bishop to pressure h5.

[FEN "6k1/8/p3p1b1/1p1pPpPp/2pP1N1P/P7/1PP5/2K5 w - - 0 1"]




The previous point began with "if you can't push pawns of your own". But you do have a pawn or two with moves, so let's look at those. Pushing the b-pawn isn't very appetizing, as it would likely result in a half-open c-file for Black to use to attack you. But what about a3-a4? It doesn't lose any material, and it somewhat mitigates the threats posed by ...b5-b4, since Black would no longer have anything to capture. He could still take ...bxa4, but once you recapture with Nxa4, he only has a half-open b file, and meanwhile your Knight is placed to advance to c5. Your dark-square Bishop and your Queen also have potential to slide around Black's wall via d2. All in all, not ideal, but not too bad either.

[StartFlipped "0"]
[FEN "r2q1rk1/4b3/p1n1p1b1/3pPpPp/N1pP1B1P/5N2/1PP1Q3/2KR2R1 b - - 0 1"]


Position after 1.a4 bxa4 2.Nxa4.



None of the above lines are perfectly satisfactory: they're either too slow, or potentially inadequate in terms of dealing with Black's queenside threats. Thus we have a third possibility: the King is in danger and no one can come to his aid--therefore, we flee to the kingside.

Because the position is so closed, and Black has no immediate threats against your King, you could simply play Kd2 right away, and march your King out of harm's way, simultaneously clearing spaces for your other pieces to maneuver to the queenside if need be. I'm not going to cover this option in any further detail since Wes already gave a good account of it in his answer, so you should go read about it there.

Conclusion

Three basic plans come to mind for me. Hopefully they at least give you some insight into how I would tackle this situation, so you will be able to evaluate them on their own merits and drawbacks, and then either choose among them or come up with something altogether better!


As a medium-term goal, reorganize the kingside to place a Knight on f4 to pressure all of Black's kingside forces and tie his pieces to the defense of his wall.
Soon or immediately, a3-a4 could be played to limit Black's queenside attacking potential and potentially close the position completely, or free your own pieces to end-around Black's wall.
Go for a walk with your King behind your own lines, via d2 and e3, to make room for your other pieces to maneuver and get your monarch out of the danger zone.