Pastor Jin Minri leads a class on the basics of Christian beliefs at the Zion Church in Beijing, China. After Jin refused local authorities' request to install surveillance cameras inside his house church, police individually questioned hundreds of members of the 1,500-person congregation, he said.

NANYANG, China — The 62-year-old Chinese shopkeeper had waited nearly his entire adult life to see his dream of building a church come true — a brick house with a sunny courtyard and spacious hall with room for 200 believers.

But in March, about a dozen police officers and local officials suddenly showed up at the church on his property and made the frightened congregants disperse. They ordered that the cross, a painting of the Last Supper and Bible verse calligraphy be taken down. And they demanded that all services stop until each person, along with the church itself, was registered with the government, said the shopkeeper, Guo.

Without warning, Guo and his neighbors in China's Christian heartland province of Henan had found themselves on the front lines of an ambitious new effort by the officially atheist ruling Communist Party to dictate — and in some cases displace — the practice of faith in the country.

“I've always prayed for our country's leaders, for our country to get stronger,” said Guo, who gave only his last name out of fear of government retribution. “They were never this severe before, not since I started going to church in the 80s. Why are they telling us to stop now?”

Under President Xi Jinping, China's most powerful leader since Mao Zedong, believers are seeing their freedoms shrink dramatically even as the country undergoes a religious revival. Experts and activists say that as he consolidates his power, Xi is waging the most severe systematic suppression of Christianity in the country since religious freedom was written into the Chinese constitution in 1982.

The crackdown on Christianity is part of a broader push by Xi to “Sinicize” all the nation's religions by infusing them with “Chinese characteristics” such as loyalty to the Communist Party. Islamic crescents and domes have been stripped from mosques, and a campaign launched to “re-educate” tens of thousands of Uighur Muslims. Tibetan children have been moved from Buddhist temples to schools and banned from religious activities during their summer holidays, state-run media report.

This spring, a five-year plan to “Sinicize” Christianity in particular was introduced, along with new rules on religious affairs. Over the last several months, local governments across the country have shut down hundreds of private Christian “house churches.” A statement last week from 47 in Beijing alone said they had faced “unprecedented” harassment since February.Authorities have also seized Bibles, while major e-commerce retailers JD.com and Taobao pulled them off their sites. Children and party members are banned from churches in some areas, and at least one township has encouraged Christians to replace posters of Jesus with portraits of Xi. Some Christians have resorted to holding services in secret.A dozen Chinese Protestants interviewed by the Associated Press described gatherings that were raided, interrogations and surveillance, and one pastor said hundreds of his congregants were questioned individually about their faith. Like Guo, the majority requested that their names be partly or fully withheld because they feared punishment from authorities.The party has long been wary of Christianity because of its affiliation with Western political values. Several Chinese human rights lawyers jailed for their work are outspoken Christians.

This house church in the city of Zhengzhou in central China's Henan province was demolished. Under President Xi Jinping, China's most powerful leader since Mao Zedong, believers are seeing their freedoms shrink dramatically even as the country undergoes a religious revival.