不吝

shì fǒu yǒu dàng shàng xī bù lìn cì jiào

是否有当，尚希不吝赐教。

We hope that you will not spare your comments on this.

bù lìn dǐng lì xiāng zhù

不吝鼎力相助

hope to gain your generous assistance

kěn qǐng gè wèi lǎo shī bù lìn pī píng zhǐ zhèng

恳请各位老师不吝批评指正。

I cordially want teachers to point out my mistakes.