Dr. Xinglai Laura Huang, wife of Liberal MP Geng Tan, who works as a scientist at Environment Canada, is seeking the Liberal nomination in their riding, Don Valley North, in Toronto.

Former Ontario Liberal MP Han Dong, left, lawyer Bang Gu Jiang, and Laura Huang are seeking the Liberal nomination in the GTA riding of Don Valley North. The nomination opened up last month when Liberal MP Geng Tan, right, announced he would not seek re-election in order to spend more time with his family.