Zhegao

Qunlong Plastic Products Co. Ltd., also know as Zhegao, Lin07, and Lezi is a Chinese company based in Chenghai District, China. They produce and sell building block sets.

Brick4: http://brick4.com/brand/32

Official Site: http://en.qunlongtoys.com/

Alibaba: https://qunlongtoys.en.alibaba.com/