People look at LEGO models during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

A LEGO builder showcases his LEGO truck models during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

People look at LEGO models during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

People look at LEGO models during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

People look at LEGO models during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

People look at LEGO models during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

People look at LEGO models during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

A child takes a look at a LEGO robot during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)

A LEGO builder showcases his fire station model during the annual BrickCan convention at River Rock Theater in Richmond, Canada, May 4, 2019. As one of Canada's largest LEGO conventions, the annual BrickCan is held here from May 4 to 5, showcasing hundreds of models built by LEGO fans from all over the world. (Xinhua/Liang Sen)