The doubled  fianchetto is an anti-KID line, which both Andreikin and Artemiev love and play with pleasure.
1. g1f3  1... g8f6  2. b2b3  2... g7g6  3. c1b2  3... f8g7  4. g2g3  4... e8g8  5. f1g2  5... d7d6 