On 16 September, China officially announced to submit the plan to request natural extension of their continental shelf up to Okinawa Trough extend the EEZ to UN Commission on the Limits of the Continental Shelf.[62] In Shenzhen, about 2,000 protesters tried to push their way into a Chinese Communist Party facility, and clashed with People's Armed Police.[46] Protesters hurled bottles at the police guard in front of the Communist Party facility and threw rocks at the vehicles parked in the lot of the Communist Party building.