Xueqiu app has a fund called 【Debt Doesn't Worry】, and surprisingly, the annual return is quite good.

For secondary bond funds allocation: 10% micro trading, 10% gold, 80% pure bonds.
Three consecutive years of positive returns, now entering the fourth year.
Established for 948 days (2.6 years), with an annualized return of 5.03%, maximum drawdown of -2.16%, and a Sharpe ratio of 1.4.