Dark Nano nano tech

My name is Li Feng.
Life was full of pleasure being smart, handsome and born in a rich family..although there is only my grandfather in my family and no other relatives.. i still like my current life very much.
my grand father is the scientist working with government with some secret projects about weapons.. his dream is to make most advanced AI chips robots powerful enough to replace weapons and kill without being notice he work his whole life for his dream... until my 16th birthday he suddenly left home for urgent works to oversees.. before he left he gave me a letter and a box as my gift...
and I never thought that starting after that my life is no longer the same....