The eTX was on display at the LTWOO booth during this year's Shanghai Bike Show. The display bore the label "二代升级" (Second-Generation Upgrade), indicating it is a second-generation model. Unlike the eRX, it is highly likely that LTWOO has been making repeated in-house improvements to the eTX.
This has also been featured on the blog of the Japanese bicycle shop "AveloBicycleShop."