"Many of these churches have been on these sites for probably 1,000 years, and probably as long as they've been standing they've had bats in them," says Diana Spencer, from the Bats in Churches Project.
Wuji Technology, based in Shanghai, is one of those firms.
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DataWorks 的架构设计与实践
"I feel honoured to be part of the team that can make a difference," says Squire, pictured with friend and colleague Pete Manning