For two years, bad news has kept piling on for Chinese property developers.

The nation¡¯s worsening credit crisis has led to defaults, failure to deliver homes on time and an unrelenting market selloff. Now a new phenomenon is happening: Builders¡¯ founders are leaving.

Longfor Group Holdings¡¯ Wu Yajun resigned on Friday as executive director and chair, shortly after Soho China¡¯s Pan Shiyi quit in September. While Wu cited health reasons, the timing has startled analysts.