My boy is 8+ mths already and he still reject solid food like puree / instant cereal / blended porridge. I am so worried seeing him cry every solid feeding. I try not to force feed. I stretch his milk feeding time to 5 or even 6 hrs and try feeding with puree food first but it doesn't help either. He lost so much weight and dropped to10 percentile.

Feed milk first, 1hr later den feed food.. Baby main source of food is still milk until 1year old. If he's not into food, add milk with some puree. Try Apple puree, avocado, banana, sweet potato, pumpkin.. You are only trying out food with him at this point of time..not as a main source of nutrients/food :) don't rush.. Take it slow.. Don't stretch his feeding time too.. Baby needs milk :)