Bitcoin Core development activity has shown a noticeable rebound. After years of declining enthusiasm for development, this most important open-source Bitcoin project is reversing its downward trend. Industry observers point out that this positive signal reflects the developer community's renewed focus on ecosystem building. From code submission frequency, PR review efficiency, to the number of contributors, multiple indicators are trending positively. For Bitcoin and its technological evolution, the activity level of Core development directly relates to the health of the ecosystem. This revival indicates that, after a period of dormancy, innovation and maintenance work on the Bitcoin base layer are accelerating.