Chinese company CREG produce world largest rectangle shield tunnel boring machine.

It has a width of 14.82 metre and 9.446 metre height. Produced in CREG Shanghai factory.  TBM will be used for highway road tunnel in Zhejiang region Jiaxing city.

my source: Turkish newspaper Dünya: https://www.dunya.com/dunya/cin-dunyanin-en-buyuk-tunel-yapma-makinesini-uretti-haberi-467688