英语短文请找出错误It is a private company.They both have 2 fields inc

英语短文请找出错误
It is a private company.They both have 2 fields including water-based coatings and solvent-based coatings.Helen,Lvliang and I met with their engineer Mrs.Li in her office.She told us she had contact with our sales in Beijing.But it is several years ago.Helen introduce our C series,888 series,etc.and our color system to her.As for colorants,she told us they grind all the colorants by themselves in the plant.They purchased the powder from national company with lower price.Such as Oxide Red & Yellow,the powder cost is about 5 RMB/kg.Helen discussed the process of grinding the colorants with her.She agreed it is difficult to control the performance of each group colorants.But their GM believed it can save more money for their cost.I think she showed her interest in our color system.Helen gave her a particular presentation.They also have many points of sales in every city.It is a right topic both of we have been interest in.Mrs.Li also showed her interest in our 888 series.Although they grind the S/B colorants by themselves.But their quality is not stable enough.Helen has answered her several questions.Mrs.Li said their output can reach more than 10,000 MT.They had built a new factory in Xinjiang province.It is mainly producing W/B architecture coatings and it starts working now.They supply all the material from Taiyuan to their new factory by themselves including the colorants.We should keep contact with them.I will communicate deeper when we visit her in the next time.
帮找语法和句型用词形态 各种错误,奖励100分
Thank you for your answers.Both are helpful to me.

It is a private company.They both have 2 fields including water-based coatings and solvent-based coatings.Helen,Lvliang and I met with their engineer Mrs.Li in her office.She told us she had contact(contacted) with our sales(+department) in Beijing.But it is (was)several years ago.Helen introduce(introduced) our C series,888 series,etc.and our color system to her.As for colorants,she told us they grind(ground) all the colorants by themselves in the plant.They purchased the powder from national company with lower price.Such as Oxide Red & Yellow,the powder cost is about 5 RMB/kg.Helen discussed the process of grinding the colorants with her.She agreed (+to the fact that)it is difficult to control the performance of each group colorants.But their GM believed it can save more money for their cost.I think she showed her interest in our color system.Helen gave her a particular presentation.They also have(had) many points of sales in every city.It is a right topic both of we(us) have been interest in.Mrs.Li also showed her interest in our 888 series.Although they grind (ground)the S/B colorants by themselves.But (去掉but)their quality is not stable enough.Helen has answered her several questions.Mrs.Li said their output can reach more than 10,000 MT.They had built a new factory in Xinjiang province.It is mainly producing W/B architecture coatings and it starts working now.They supply all the material from Taiyuan to their new factory by themselves including the colorants.We should keep contact with them.I will communicate deeper when we visit her in the（去掉in the） next time.
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