Not safe.

1. Shunya Lao Jiang Wang Yi Washing Black is a hair dye. The p-phenylenediamine contained in the hair dye is a carcinogen.

2. Frequent use of some blackeners may cause damage to the scalp and cause massive hair loss.

3. Hair dyes may cause allergic reactions in the body, causing symptoms such as scalp redness and facial rash.

4. Hair dyes contain many chemical substances. The body metabolizes toxic substances mainly through the liver and kidneys. Long-term use will cause certain damage to the liver and kidneys.