I am a bussiness man holding a kenya pasport

HI,my names are MOHAMED SHEIKH NOOR ,am a kenyan citizen leaving in china(guangzhou).. .. i have small problem in my passport which the photo side of my pasport actually have small damage which is not bright & clear to see well ,since i used to hold in pockets...so, for this issues ,i have some problems at the immigration when exit and entry...it causes delays to my progress which make them doubt of the effectivesness of my pasport...so, i have decided to apply new pasport,so that it clears doubt behind and to bind it to the one i have, so that i refrain from problems at the immigrations departments whenever needded..

PLEASE ADVICE ME ON THE REQUIREMENTS NEEDED FROM ME....i will appreciate your responces