Summarizing Celta news

The user provided a Chinese news headline about the Celta Vigo president stating that there will be no signings in the winter transfer window due to no registration slots. They likely want a concise summary or clarification. I could ask whether a brief overview or implications are needed, but I want to highlight key points: the president’s statement, financial fair play, potential outgoing transfers, and Celta's recent struggles with relegation in La Liga.