lock someone into something
phrasal verb with lock verb uk/lɒk/ us/lɑːk/
把（某人或机构）锁定在财务协议上（阻止其终结或改变）
to prevent a person or organization from ending or changing an agreement or financial arrangement
The gas company is locked into long-term supply contracts. 煤气公司被锁定在长期供气协议中。