Due to the complete absence of information regarding the plot, characters, or themes of 'Peking Duck Restaurant', an evaluation of its LGBTQ+ portrayal cannot be performed. The film is therefore rated N/A, indicating no identifiable depiction could be assessed.

Based solely on the provided input, there is no information available to assess the presence or portrayal of transsexual characters or themes in 'The story of Mrs. Yivga'. Consequently, a determination of its net impact cannot be made.

The movie does not contain any action or adventure elements.

No prior source material, established canon, or historical figures are provided for "Peking Duck Restaurant" (1990). Without a baseline for character genders, it's impossible to identify any instances of gender swapping as defined.

No information is provided regarding specific characters, their established races from source material, or the actors portraying them. Therefore, it is impossible to determine if any race swaps occurred.