“Splitting the comb“ is one of the Chinese traditional funeral customs. It means that if either one of the couple passed away, before the funeral, a “split comb” ceremony is performed for the couple respectively. It symbolizes a good ending of their marriage. After the ceremony, they both can go their own way, the dead can leave with peace of mind and the living party can remarry without being disturbed by the partner on the other world.
This custom usually applies only to young couples. For couples who are over half a century old, it is not necessary to do this “split comb” ceremony.