Historical relic No. 7 Tai Luong is a memorial stele to commemorate the compatriots and comrades who died in the 1931 protest. This was a demonstration that marked an important historical milestone in the height of the revolution 1930 - 1931. of Binh Dinh province. From July 22 to 23, 1931, the protesting delegation of more than 3 thousand people gathered from all directions, forming active wings to cover Bong Son street. Wherever the protesters went, they suppressed their wife and burned the guard stations along the road. At around 1:30 am on July 23, 1931, when the protesters arrived at PK 7 Tai Luong, they were stopped by enemy soldiers, this unit was just transferred from Quy Nhon to deal with the demonstration. Meeting strong enemy forces, the protesters did not waver, the more tightened the team, determined to advance. Immediately the enemy soldiers rushed into the protesting group to pull flags, bandages and fire their guns at the convoy. 13 Party members and the masses were sacrificed, one Party member was sentenced to death, 3 Party members were sentenced to life in prison, 20 members were exiled to Buon Me Thuat prison, 11 members were sent to Kon prison. Tum, 47 comrades were detained at the Binh Dinh prison and hundreds of masses were detained at the Phu Ly prison. The protest was evaluated by "History of the Binh Dinh Party Committee": "Typical for the fighting spirit of Binh Dinh workers and farmers in the peak of 1930-1931"!