Repeated skin contact may result in absorption of harmful amounts. Inhalation: Brief exposure (minutes) is not likely to cause adverse effects. at 100 ppm; higher levels produce eye, nose, and throat irritation and are intolerable at 1000 ppm. Anesthetic effects are seen at or above 1000 ppm.
There are three types of Chinese in general: 1. Mandarin, written using short-form (Simplified Chinese) characters-Mainland China and Singapore 2. Mandarin, written using long-form (Traditional Chinese) characters-Taiwan 3. Cantonese, written using long-form characters-Hong Kong and overseas Chinese.
For the best answers, search on this site https://shorturl.im/axv9U. Pinyin is Mandarin. Pinyin is a method of writing Mandarin Chinese using the Roman alphabet. It is not a different language. It is not used much in China, but is helpful for learners. Children learn it but soon switch to Chinese characters.