At 36:33, an elderly couple of Chinese are speaking standard Mandarin in a restaurant presumably in Harlem. However, Mandarin speakers would have been extremely rare in New York or anywhere else beyond Northern China at that time and for several decades afterwards. Any Chinese in New York and the rest of the States and Europe would have been speaking Cantonese, Hokkien, or some other Southern Chinese dialect, with the exception of the wealthier Shanghainese, who had their own dialect until very recently.