At the invitation of Punctuality Theory and Method Research Office of National Time Service Center, Ni Weidou from NTHU visited the National Time Service Center on Sept. 11 to 14, and made an academic report titled “No frontiers: Starting with Laser Ranging, Deep Space Gravitational Wave Detection and Universe Measurement” on the afternoon of Spt. 12. This seminar was presided over by Tong Minglei, an associate researcher from Punctuality Theory and Method Research Office, and attended by more than 20 personnel concerned from the Center.