Novelist and filmmaker Xiaolu Guo has a wonderfully deadpan sense of humor. This was evident in her previous book, “A Concise Chinese-English Dictionary for Lovers,” which revealed, in the form of a glossary, a fraught-with-misunderstandings romance between an untutored Chinese peasant girl, who comes to London to study languages, and the bisexual British aesthete whom she meets at the movies. Likewise, Guo’s feature debut as a director, the meta-comedy “How is Your Fish Today?” was a gentle satire about a Beijing hipster trying to succeed as a screenwriter, despite having none of his scripts make it past government censors.