According to Baidu Encyclopedia, the coupon interest of convertible bonds of corporate bonds is relatively low, with the interest of corporate bonds being 5% and above, and that of debt interest being 3%. Convertible bonds have the property of stocks, so the coupon of most convertible bonds is very low, usually in the range of 1 to 2%.
In the issuance system, corporate bonds are examined and approved by the CSRC, which has the right to decide whether to approve their issuance, and there is no certain constraint on the overall issuance scale. Corporate bonds are audited by the National Development and Reform Commission, which sets a certain issuance quota every year.