A group of Google employees published an open letter on Tuesday calling on their employer to cancel its plans to build a censored search engine for China, the latest expression of worker unrest at a company that earlier this month saw thousands stage walkouts over its handling of sexual misconduct cases. Google's plan for returning to China, which is known as Project Dragonfly and would reportedly allow the Chinese government to blacklist certain search terms and control air quality data, has garnered significant backlash internally since it was first reported on in August. More than 1,400 Google employees signed an internal petition criticizing the lack of transparency around the project, and at least one employee resigned in protest. But Tuesday's letter, which was initially signed by nine current Google employees, is a bold step for employees of a company that prizes internal transparency but considers leaking information to be not "Googley". Organizers of the letter said they would continuously update the letter as more employees signed on; by midday there were more than 50 signers.