With the 13-inch variant of the Yoga 730, users can choose to equip the slim system with either a 4K or an FHD IPS touchscreen, and can opt for an i7-8550U or an i5-8250U CPU. They can further add 8 or 16 GB of DDR4 RAM and up to 512 GB of NVMe SSD storage. This model specifically impresses with the 2x Thunderbolt 3 connectors that come standard on any variant.
https://www.notebookcheck.net/Lenovo-s-13-inch-Yoga-730-2-in-1-notebooks-now-available.303170.0.html
There are quite a few inaccuracies in this report.
As per the tech specs on Lenovo's site, the 13" Yoga 730 does not have a 4K option, nor does it have HDMI & Displayport.
You forgot soldered RAM.