1. Cov khoom siv: kev xaiv ntawm cov ntoo khoom ntoo yog qhov tseem ceeb heev. Cov ntoo sib txawv tsob ntoo muaj cov cim sib txawv thiab cov yam ntxwv. Koj yuav tsum xaiv ntau hom ntoo hluav taws ntoo raws li koj cov kev xav tau thiab peev nyiaj.
2. Ua thev naus laus zis: kev ua haujlwm thev naus laus zis ntawm cov khoom ntoo ntoo kuj cuam tshuam rau qhov zoo ntawm cov laug cam. Cov khoom siv hluav taws xob zoo tuaj yeem zam cov teeb meem xws li kev tawg thiab ua kom zoo nkauj thiab nce kev zoo nkauj thiab kev pabcuam lub neej ntawm cov laug cam.
3. Cov khoom lag luam zoo: mus yuav siab- Cov ntoo zoo ntawm cov ntoo, thiab lwm yam.
4. Cov Ntawv Tshwj Xeeb: Yog tias cov ntoo hluav taws xob cov khoom siv tshwj xeeb, koj yuav tsum tau xaiv cov ntaub ntawv tshwj xeeb ntoo, lossis cov ntaub ntawv noo {2} -
Cov duab rauTawv Paulownia ntooUa los ntawm Cao County Huifengyuan Ntoo Co., Ltd.
