The largest ever Crossover (XRE) TBM in China launched in late March 2021 in Guangzhou for contractors Sichuan Jinshi Heavy Equipment Leasing Co. Ltd. and CREC Bureau 2. Onsite First Time Assembly (OFTA) was utilized to build the 9.16 m (30 ft) diameter Robbins TBM. `In just 5 months.`

https://tunnelingonline.com/chinas-largest-robbins-crossover-tbm-launches-on-intercity-railway/