Overall, looks like you have put considerable work and background research into it. Here are my comments on certain sentences that I came across in the limited time spent browsing your SOP.
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"Naturally, I didn’t want to stop after my Engineering" -- did you mean undergraduate degree ? "...stop after my Engineering..." does not make much coherent sense
"Besides academical work" -- academic
"I also gave several seminars on various topics in my class and also participated in a national level paper presentation which strengthened my communication skills." -- could be more specific, perhaps list a few topics and indicate the name of the conference/symposium where the paper was presented.
"long before I joined my engineering" -- again what do you mean by "engineering" ?
There seem to be a lot of capitalized first letters thrown around. For example, you do not have to capitalize the S in security or E in engineering unnecessarily. Capitalization is needed only if it is a part of the given name, for e.g. New Jersey Institute of Technology.
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All the best for your application !
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