Question: what does Tongshanjiabu and Changtse have in common?

Context paragraphs:
Changtse: Changtse (Tibetan: "north peak") is a mountain situated between the Main Rongbuk and East Rongbuk Glaciers in Tibet, China, immediately north of Mount Everest.  It is connected to Mount Everest via the North Col.

Tongshanjiabu: Tongshanjiabu () is a mountain in the Himalayas.  At 7,207 m tall, Tongshanjiabu is the 103rd tallest mountain in the world.  It sits in the disputed border territory between Bhutan and China.  Tongshanjiabu has never been officially climbed.

Supporting paragraphs: Tongshanjiabu Changtse
Answer: mountain