90CM chest circumference can basically confirm that your pectoral muscles and latissimus dorsi are very underdeveloped. Didn't even get basic exercise at all. Brother, you still have a long way to go.
Personally, I think that men, especially our fellow travelers, should have a chest circumference of at least 95CM. This is the bottom line.
Muscles that affect the chest circumference: mainly pectoralis major and latissimus dorsi, followed by a part of external abdominal oblique muscle and a part of teres minor.
Chest muscles and back width are one of the most difficult muscles for lovers to practice.
Let's talk about the most important circumference of bodybuilders: the circumference of biceps brachii. I don't know how your data of 28 was measured, or after the extreme contraction of your upper arm. Or when it droops naturally? If it is the upper arm circumference when it is naturally drooping, then 28 is not small. If it is the upper arm circumference after contraction, it is too small.
I won't say anything else. Your weight is only 1 16, which is a little too thin. Pay attention to protein's supplement in practice. (You can buy protein powder if you can. Generally, like me, you can add more meat, eggs and milk beans. )