Santi (2019)

Blurb:
Amid China’s Cultural Revolution in the 1960s, a covert military project establishes contact with Trisolaris, an alien planet on the brink of destruction. This sets into motion the Trisolarans’ long and menacing journey to invade Earth. Meanwhile, a secret society is formed by the world’s elite, broken into factions with differing motivations for aiding in the Trisolaran invasion—from saving the lives of their descendants to accelerating the destruction of humanity. Decades later, a group of scientists and a cunning detective investigate a series of mysterious suicides, leading to the discovery of this Earth-Trisolaran Organization. Humanity’s battle against its greatest threat has begun …

Source: www.anisearch.com/manga/86547