There is no mention of the Chumbi Valley. But the narrative is aware that Khye Bumsa came to The Kong Tek (spelt ti kung tek) for help with children and returned later to thank him. However The Kong Tek is said to have realized that Khye Bumsa's sons would invade Sikkim.
There is no mention of the Chumbi Valley. Nevertheless, it is understood that Khye Bumsa sought aid from The Kong Tek concerning children and later returned to express appreciation. Consequently, The Kong Tek became aware that Khye Bumsa's sons would invade Sikkim.