How to check the quotation of decoration company?

Water and electricity lines can be quoted, if not guaranteed, it is nearby. This is the split of the whole project, leaving room for future price increases. The construction project won the bid at a low price and will be changed later. This will increase the investment of the owners. The quantity she quoted should be checked one by one. If you don't understand, you should explain to her. You'd better find a friend who knows the business. There are a lot of tricks in the quotation, which has been quoted before, but it was later reported under a different name. You can't buy installation materials from their designated merchants, but ask them to provide the specifications, models and requirements of the materials, shop around and try to buy them yourself. The construction process should be supervised by knowledgeable confidants and family members. For example, putty should be scraped twice and scraped three times.