Every dish at China Square Hainan Famous Beef Noodles Rice 中国城海南牛肉面 (#01-45) costs $5 nett. They serve a couple of delicious soupy options, with white rice 白饭 (50¢) costing additional:
[1] Raw Beef Soup 生牛肉汤 / Beef Soup 熟牛肉汤
[2] Beef Ball Soup 牛肉圆汤
[3] Combo Soup 牛什汤

If you are a noodley kind of person like I am, you can opt for either the dry 干 or soup 汤 variant of these:
[4] Raw Beef Noodles 生牛肉面
[5] Beef Noodles 熟牛肉面

I ordered the Dry Raw Beef Noodles 生牛肉面; the generous amount of thick sauce was pretty good, mixed in with the thick bee hoon 粗米粉 that thankfully wasn't overcooked.

I initially thought there weren't enough beef slices, but I ate my words when I made it to the end of my dish with a food ratio of noodles & beef in every spoonful I had. I liked how the beef slices were sliced to a good thickness & weren't over nor undercooked

While I didn't find this a mind-blowing bowl of noodles, I did enjoy it & I also really liked the soup that came with it - definitely want to try the soup version next time!