BEIJING (AP) — The first scientist to publish a sequence of the COVID-19 virus in China said he was allowed back into his lab after he spent days locked outside, sitting in protest.

Zhang Yongzhen wrote in an online post on Wednesday, just past midnight, that the medical center that hosts his lab had “tentatively agreed” to allow him and his team to return and continue their research for the time being.

“Now, team members can enter and leave the laboratory freely,” Zhang wrote in a post on Weibo, a Chinese social media platform. He added that he is negotiating a plan to relocate the lab in a way that doesn’t disrupt his team’s work with the Shanghai Public Health Clinical Center, which hosts Zhang’s lab.

Zhang and his team were suddenly told they had to leave their lab for renovations on Thursday, setting off the dispute, he said in an earlier post that was later deleted. On Sunday, Zhang began a sit-in protest outside his lab after he found he was locked out, a sign of continuing pressure on Chinese scientists conducting research on the coronavirus.