I'm quite busy these days so no time to do a full write up of the Shanghai exhibition
Concerning Wheel Top, it's a total flop from the few testimonials I skimmed over
Shifting is slow, clunky and unresponsive (especially FD) which is odd because their MTB RD apparently shifts quite fast now. Batteries are still 'removable' but now screwed in place(?) due to patent restrictions. Build quality sucks and the general feeling is not as premium as eRX. July target launch for the Rim brake model is ambitious and unrealistic.
Sensah hydraulic levers feel weak and their electronic groupset has been pushed back for the nth time.
L-TWOO is still by far the most promising.