New forum member here, and starting a new thread after posting about this in a thread on the LightCarbon LCR017-D (https://chinertown.com/index.php/topic,4309.255.html).

Long story short: I snuck in to the Taipei Bike Show today to check out some Longteng and LightCarbon frames, and at the Longteng booth, I found out that they have an unreleased frame which is undergoing testing: the RD301-D.  Here is a short video that I took, and a few pages from their brochure with its geometry: https://imgur.com/a/XvH327j.

Appearance wise, the 301 doesn't break any new ground, but a few things stand out:
- It has an aero profile but is under 1000g weight
- The geometry (especially stack) sort of sits between an upright endurance bike and bikes like the Velobuild 177 and 268, Winspace SLC 2.0 and 1500, Yoeleo R11 - this geometry is a sweet spot for me [edit: the geometry seems comparable to the touted all-arounder Trigon AR01]
- Whoa, max tire clearance of 38!
- Cool little storage space on the downtube
- Threaded T47 BB
- Per their rep Alisa, it's made with a mix of T800 and T1000 carbon

This frame hasn't been posted on their website, and Alisa said it will be released "in a few months" once testing is complete.  The 54cm has passed their tests and is available if anyone is interested - you can email Alisa at longtengalisa@163.com.

Peace out!

[Edited to add reference to the Trigon AR01]