Pema Wangjom Thongdok's detention at Shanghai aiport has fuelled a diplomatic row between Delhi and Beijing.
Bilateral relations between India and China have improved since the 2020 clash - but larger challenges remain.
A new museum preserves the memories of an often-forgotten World War Two military operation in India.
Beijing denies claims three Indian fighters are unable to enter China for the Asian Games.
Delhi's comments come amid reports that China has renamed 11 places along a disputed Himalayan border region.
Memories of a painful past are still fresh in Tawang, but its people hope for a better future.
Tawang is home to India's largest Buddhist monastery - China claims it as part of Tibet.
India's foreign minister said that the country was ramping up troops to "counter Chinese aggression".
Latgam Singpu and his team use rope bridges, school buses and incentives to reach remote villages.
