yísuàn
исуань
и2 суань4
http://www.chinese-russian.com/zd/ci/183512
http://www.chinese-russian.com/zd/ci/183514
yǐsuān
и3 суань1
http://www.chinese-russian.com/zd/ci/132952
http://www.chinese-russian.com/zd/ci/171964