Correspondence undergraduate students must also obtain a bachelor's degree certificate before they can apply for the master's college entrance examination. If you graduate from junior college for three years, you should only get a certificate in the first half of this year. In this case, if you want to study for a master's degree, you must graduate from a junior college for three years, not three years. My situation is similar to yours. The master's correspondence in our school is Tianjin Institute of Technology. I don't know if it's good.
But suppose you just want to improve your diploma, then a bachelor's degree is enough, and the certificate of cost major and even civil engineering will not affect your exam. You know you can't learn anything by correspondence, and the tuition is very expensive. It is better to attend more research training courses and get some affiliated fees every year.